Applying the HIV Prevention Cascade to an Evaluation of a Large-Scale Combination HIV Prevention Programme for Adolescent Girls and Young Women in South Africa.

Adolescent girls and young women (AGYW) in South Africa are at a three times higher risk of acquiring HIV than their male counterparts. The HIV prevention cascade is a tool which can be used to measure coverage of HIV prevention services, although there is limited empirical evidence to demonstrate its application in low-resourced settings. The unifying framework is a conceptualisation of the HIV prevention cascade which theorises that both motivation and access are required for an individual to effectively use an HIV prevention method. We applied this framework to data from a random sample of 127,951 beneficiaries of a combination HIV prevention programme for AGYW aged 15-24 in South Africa to measure the steps to, and identify key barriers to, effective use of male condoms and oral pre-exposure prophylaxis (PrEP) among this vulnerable population. Barriers to each step were analysed using univariate and multivariable logistic regression. Among self-reported HIV-negative AGYW who had sex in the past 6 months, effective use of condoms (15.2%), access to PrEP (39.1%) and use of PrEP (3.8%) were low. AGYW were: less likely to be motivated to use condoms if they believed that they had a faithful partner (aOR 0.44, 95% CI 0.22-0.90) or disliked condoms (aOR 0.26, 95% CI 0.11-0.57), less likely to access condoms if the place where AGYW accessed them was far away (aOR 0.25, 95% CI 0.10-0.64), more likely to effectively use condoms if they received counselling on how to use them (aOR 2.24, 95% CI 1.05-4.76), less likely to be motivated to use PrEP if they did not believe PrEP was efficacious (aOR 0.35, 95% CI 0.17-0.72), more likely to be motivated if they felt confident that they could use PrEP, and more likely to have access to PrEP if they had ever been offered PrEP (aOR 2.94, 95% CI 1.19-7.22). This combination HIV prevention programme and similar programmes should focus on risk-reduction counselling interventions for AGYW and their male partners to improve effective use of condoms and ensure easy access to condoms and PrEP by making them available in youth-friendly spaces. Our findings demonstrate that the application of HIV prevention cascades can inform AGYW HIV prevention programming in low-resourced settings.

Identifying Adolescents at Highest Risk of ART Non-adherence, Using the World Health Organization-Endorsed HEADSS and HEADSS+ Checklists.

Brief tools are necessary to identify adolescents at greatest risk for ART non-adherence. From the WHO's HEADSS/HEADSS+ adolescent wellbeing checklists, we identify constructs strongly associated with non-adherence (validated with viral load). We conducted interviews and collected clinical records from a 3-year cohort of 1046 adolescents living with HIV from 52 South African government facilities. We used least absolute shrinkage and selection operator variable selection approach with a generalized linear mixed model. HEADSS constructs most predictive were: violence exposure (aOR 1.97, CI 1.61; 2.42, p < 0.001), depression (aOR 1.71, CI 1.42; 2.07, p < 0.001) and being sexually active (aOR 1.80, CI 1.41; 2.28, p < 0.001). Risk of non-adherence rose from 20.4% with none, to 55.6% with all three. HEADSS+ constructs were: medication side effects (aOR 2.27, CI 1.82; 2.81, p < 0.001), low social support (aOR 1.97, CI 1.60; 2.43, p < 0.001) and non-disclosure to parents (aOR 2.53, CI 1.91; 3.53, p < 0.001). Risk of non-adherence rose from 21.6% with none, to 71.8% with all three. Screening within established checklists can improve identification of adolescents needing increased support. Adolescent HIV services need to include side-effect management, violence prevention, mental health and sexual and reproductive health.

Digital tools for youth health promotion: principles, policies and practices in sub-Saharan Africa.

Although digital health promotion (DHP) technologies for young people are increasingly available in low- and middle-income countries (LMICs), there has been insufficient research investigating whether existing ethical and policy frameworks are adequate to address the challenges and promote the technological opportunities in these settings. In an effort to fill this gap and as part of a larger research project, in November 2022, we conducted a workshop in Cape Town, South Africa, entitled 'Unlocking the Potential of Digital Health Promotion for Young People in Low- and Middle-Income Countries'. The workshop brought together 25 experts from the areas of digital health ethics, youth health and engagement, health policy and promotion and technology development, predominantly from sub-Saharan Africa (SSA), to explore their views on the ethics and governance and potential policy pathways of DHP for young people in LMICs. Using the World Café method, participants contributed their views on (i) the advantages and barriers associated with DHP for youth in LMICs, (ii) the availability and relevance of ethical and regulatory frameworks for DHP and (iii) the translation of ethical principles into policies and implementation practices required by these policies, within the context of SSA. Our thematic analysis of the ensuing discussion revealed a willingness to foster such technologies if they prove safe, do not exacerbate inequalities, put youth at the center and are subject to appropriate oversight. In addition, our work has led to the potential translation of fundamental ethical principles into the form of a policy roadmap for ethically aligned DHP for youth in SSA.

Factors Associated with Preferences for Long-Acting Injectable Antiretroviral Therapy Among Adolescents and Young People Living with HIV in South Africa.

Long-acting injectable anti-retroviral therapy (LAART) may overcome barriers to long-term adherence and improve the survival of adolescents and young people living with HIV (AYLHIV). Research on the acceptability of LAART for this age-group is limited. We asked 953 AYLHIV about their preferred (theoretical) ART mode of delivery (pill, injectable, or other) in 2017-2018, before LAART was available or known to AYLHIV in South Africa. One in eight (12%) AYLHIV preferred LAART over single or multiple pill regimens. In multivariate analyses, six factors were associated with LAART preference: medication stock-outs (aOR = 2.56, 95% CI 1.40-4.68, p = 0.002), experiencing side-effects (aOR = 1.84, 95% CI 1.15-2.97, p = 0.012), pill-burden (aOR = 1.88, 95% CI 1.20-2.94, p = 0.006), past-year treatment changes (aOR = 1.63, 95% CI 1.06-2.51, p = 0.025), any HIV stigma (aOR = 2.22, 95% CI 1.39-3.53, p ≤ 0.001) and recent ART initiation (aOR = 2.02, 95% CI 1.09-3.74, p = 0.025). In marginal effects modelling, 66% of adolescents who experienced all factors were likely to prefer LAART, highlighting the potential high acceptability of LAART among adolescents and young people living with HIV struggling to adhere and have good HIV treatment outcomes. Adolescent boys who reported high ART pill burden were more likely to prefer LAART than their female peers in moderation analyses, suggesting that LAART may be particularly important to improve treatment outcomes among male AYLHIV as they become older. Adding LAART to existing treatment options for AYLHIV, particularly higher risk groups, would support AYLHIV to attain and sustain viral suppression-the third 95, and reduce their risk of AIDS-related mortality.

RESUMEN: La terapia antirretroviral inyectable de acción prolongada (TAR LA) puede superar las barreras a la adherencia y mejorar la supervivencia de los adolescentes y jóvenes que viven con el VIH (AJVVIH). La investigación sobre la aceptabilidad del TAR LA para este grupo de edad es limitada. Preguntamos a 953 AJVVIH sobre su modo preferido (teórico) de administración de ART (píldora, inyectable u otro) en 2017­2018, antes de que TAR LA estuviera disponible o fuera conocido por los AJVVIH en Sudáfrica. Uno de cada ocho (12%) AJVVIH prefirió TAR LA sobre los regímenes de píldoras simples o múltiples. En los análisis multivariantes, seis factores se asociaron con la preferencia de TAR LA: agotamiento de la medicación (odd ratio ajustada [ORa] = 2,56, IC95% 1,40­4,68 p = 0,002), experimentar efectos secundarios (ORa = 1,84, IC95% 1,15­2,97 p = 0,012), carga de píldoras (ORa = 1. 88, IC95% 1,20­2,94 p = 0,006), cambios de tratamiento en el último año (ORa = 1,63, IC95% 1,06­2,51 p = 0,025), cualquier estigma del VIH (ORa = 2,22, IC95% 1,39­3,53 p ≤ 0,001) y el inicio reciente del TAR (ORa = 2,02, IC95% 1,09­3,74 p = 0,025). En la modelización de efectos marginales, el 66% de los adolescentes que experimentaron todos los factores eran propensos a preferir la TAR LA, lo que pone de relieve la alta aceptabilidad potencial de la TAR LA entre los adolescentes y los jóvenes que viven con el VIH que luchan por adherirse y tener buenos resultados en el tratamiento del VIH. Los adolescentes varones que informaron de una alta carga de píldoras para el tratamiento antirretroviral eran más propensos a preferir la TAR LA que sus pares mujeres en los análisis de moderación, lo que sugiere que la TAR LA puede ser particularmente importante para mejorar los resultados del tratamiento entre los hombres que viven con el VIH a medida que crecen. La adición de la TAR LA a las opciones de tratamiento existentes para las personas que viven con el VIH, en particular los grupos de mayor riesgo, ayudaría a las personas que viven con el VIH a alcanzar y mantener la supresión vírica -el tercer 95- y a reducir el riesgo de mortalidad relacionada con el sida.

Art-based reflections from 12 years of adolescent health and development-related research in South Africa.

This paper presents empirical and methodological findings from an art-based, participatory process with a group (n = 16) of adolescent and young advisors in the Western Cape Province of South Africa. In a weekend workshop, participants reflected on their participation in 12 years of health and development-related research through theatre, song, visual methodologies and semi-structured interviews. Empirical findings suggest that participants interpreted the group research encounter as a site of empowerment, social support and as a socio-political endeavour. Through song, theatre and a mural illustration, they demonstrated that they value 'unity' in research, with the aim of ameliorating the conditions of adolescents and young people in other parts of South Africa and the continent. Methodological findings document how participants deployed art-based approaches from South Africa's powerful history of activism, including the struggle against apartheid, the fight for anti-retroviral therapy and more recent social movements towards decolonization.

HIV and SRH healthcare delivery experiences of South African healthcare workers and adolescents and young people during COVID-19.

While substantial research has emerged from the frontlines of the COVID-19 pandemic, as well as from studies with adolescent populations, there has been a dearth of research focused in South Africa on the context-specific experiences of healthcare workers (HCWs) and the adolescents and young people (AYP) to whom they provide services. This article documents the experiences of provision and receipt of HIV and sexual and reproductive health (SRH) services during the COVID-19 pandemic from the perspective of South African HCWs (n = 13) and AYP (n = 41, ages 17-29). Findings highlight several barriers to accessing comprehensive HIV and SRH services during the pandemic including lockdown-related mobility restrictions (reported by HCWs), prioritisation of COVID-19 above other healthcare needs, longer health facility waiting times, poor treatment by HCWs (reported by AYP), discomfort and perceived stigma from having to queue outside health facilities, and fear of contracting COVID-19 (reported by both groups). While HCWs reported that HIV and SRH services continued to be available during the pandemic, AYP described seeking these services - such as long-acting reversible contraception, check-ups for their babies and medical refills - and being told that because they were not considered emergency cases, they should return on a different date. By capturing diverse experiences and perspectives from both groups, our findings reiterate the growing call for health system investments to strengthen the delivery of adolescent services, including investing in appropriate channels of communication between young people and their healthcare providers (for example, through adolescent peer supporters or community healthcare workers) and differentiated models of service delivery (for example, multi-month ART refills and community pick-ups). Closing the gap between the experiences and needs of adolescents and the healthcare workers who serve them may support young people and HCWs in buffering against changes brought about by the COVID-19 pandemic.

Resourcing resilience: social protection for HIV prevention amongst children and adolescents in Eastern and Southern Africa.

Adolescents are the only age group with growing AIDS-related morbidity and mortality in Eastern and Southern Africa, making HIV prevention research among this population an urgent priority. Structural deprivations are key drivers of adolescent HIV infection in this region. Biomedical interventions must be combined with behavioural and social interventions to alleviate the socio-structural determinants of HIV infection. There is growing evidence that social protection has the potential to reduce the risk of HIV infection among children and adolescents. This research combined expert consultations with a rigorous review of academic and policy literature on the effectiveness of social protection for HIV prevention among children and adolescents, including prevention for those already HIV-positive. The study had three goals: (i) assess the evidence on the effectiveness of social protection for HIV prevention, (ii) consider key challenges to implementing social protection programmes that promote HIV prevention, and (iii) identify critical research gaps in social protection and HIV prevention, in Eastern and Southern Africa. Causal pathways of inequality, poverty, gender and HIV risk require flexible and responsive social protection mechanisms. Results confirmed that HIV-inclusive child-and adolescent-sensitive social protection has the potential to interrupt risk pathways to HIV infection and foster resilience. In particular, empirical evidence (literature and expert feedback) detailed the effectiveness of combination social protection particularly cash/in-kind components combined with "care" and "capability" among children and adolescents. Social protection programmes should be dynamic and flexible, and consider age, gender, HIV-related stigma, and context, including cultural norms, which offer opportunities to improve programmatic coverage, reach and uptake. Effective HIV prevention also requires integrated social protection policies, developed through strong national government ownership and leadership. Future research should explore which combinations of social protection work for sub-groups of children and adolescents, particularly those living with HIV.

Associations of social media and health content use with sexual risk behaviours among adolescents in South Africa.

Increasing rates of mobile phone access present potential new opportunities and risks for adolescents' sexual and reproductive health in resource-poor settings. We investigated associations between mobile phone access/use and sexual risks in a cohort of 10-24-year-olds in South Africa. 1563 adolescents (69% living with HIV) were interviewed in three waves between 2014 and 2018. We assessed mobile phone access and use to search for health content and social media. Self-reported sexual risks included: sex after substance use, unprotected sex, multiple sexual partnerships and inequitable sexual partnerships in the past 12 months. We examined associations between mobile phone access/use and sexual risks using covariate-adjusted mixed-effects logistic regression models. Mobile phone access alone was not associated with any sexual risks. Social media use alone (vs. no mobile phone access) was associated with a significantly increased probability of unprotected sex (adjusted average marginal effects [AMEs] + 4.7 percentage points [ppts], 95% CI 1.6-7.8). However, health content use (vs. no mobile phone access) was associated with significantly decreased probabilities of sex after substance use (AMEs -5.3 ppts, 95% CI -7.4 to -3.2) and unprotected sex (AMEs -7.5 ppts, 95% CI -10.6 to -4.4). Moreover, mobile phone access and health content use were associated with increased risks of multiple sexual partnerships in boys. Health content use was associated with increased risks of inequitable sexual partnerships in adolescents not living with HIV. Results suggest an urgent need for strategies to harness mobile phone use for protection from growing risks due to social media exposure.

Two years after lockdown: reviewing the effects of COVID-19 on health services and support for adolescents living with HIV in South Africa.

INTRODUCTION: South Africa's progress towards the 95-95-95 goals has been significantly slower among adolescents living with HIV (ALHIV), among whom antiretroviral therapy (ART) adherence, retention in care and viral suppression remain a concern. After 2 years of living with COVID-19, it is important to examine the direct and indirect effects of the pandemic on healthcare resources, access to HIV services and availability of support structures, to assess their impact on HIV care for ALHIV. DISCUSSION: The COVID-19 response in South Africa has shifted healthcare resources towards combatting COVID-19, affecting the quality and availability of HIV services-especially for vulnerable populations, such as ALHIV. The healthcare system's response to COVID-19 has threatened to diminish fragile gains in engaging ALHIV with HIV services, especially as this group relies on overburdened public health facilities for their HIV care. Reallocation of limited health resources utilized by ALHIV disrupted healthcare workers' capacity to form and maintain therapeutic relationships with ALHIV and monitor ALHIV for ART-related side effects, treatment difficulties and mental health conditions, affecting their ability to retain ALHIV in HIV care. Prevailing declines in HIV surveillance meant missed opportunities to identify and manage opportunistic infections and HIV disease progression in adolescents. "Lockdown" restrictions have limited access to healthcare facilities and healthcare workers for ALHIV by reducing clinic appointments and limiting individual movement. ALHIV have had restricted access to social, psychological and educational support structures, including national feeding schemes. This limited access, coupled with reduced opportunities for routine maternal and sexual and reproductive health services, may place adolescent girls at greater risk of transactional sex, child marriages, unintended pregnancy and mother-to-child HIV transmission. CONCLUSIONS: Adolescent HIV care in South Africa is often overlooked; however, ART adherence among ALHIV in South Africa is particularly susceptible to the consequences of a world transformed by COVID-19. The current structures in place to support HIV testing, ART initiation and adherence have been reshaped by disruptions to health structures, new barriers to access health services and the limited available education and psychosocial support systems. Reflecting on these limitations can drive considerations for minimizing these barriers and retaining ALHIV in HIV care.

Multiple Impacts of Ethiopia's Health Extension Program on Adolescent Health and Well-Being: A Quasi-Experimental Study 2002-2013.

PURPOSE: Ethiopia has registered remarkable achievements in reaching global development goals, including reducing child marriage. Policymakers are keen to understand which investments have contributed to this. We evaluated the association between Ethiopia's Health Extension Program (HEP) and 12 adolescent health and wellbeing outcomes. METHODS: We used Young Lives Ethiopia cohort data between 2002 and 2013. We evaluated associations between household support from HEP at age 15 and 12 adolescent outcomes spread across health, gender-based violence, education, and employment at age 19 using the inverse probability of treatment weighting propensity score approach, stratifying by sex. Adjusted probability differences (APDs) and adjusted mean differences (AMDs) were used to contrast exposure to HEP versus no exposure. RESULTS: Of 775 adolescents with complete follow-up, 46% were female. Sixty-six percent of adolescents reported support from HEP, with higher rates of support in poorer, less educated, and rural households, particularly in Tigray Province. In boys, HEP was positively associated with education enrolment (APD: +20 percentage points [ppts], 95% confidence interval [CI]: +9 ppts, +31 ppts) and literacy (AMD: +6 ppts, 95% CI: +0.2, +11), and negatively associated with >4 hours in income-generating activities per day (APD: -19 ppts, 95% CI: -30 ppts, -9 ppts). In girls, HEP was positively associated with no child marriage (APD: +16 ppts, 95% CI: +4 ppts, +27 ppts), no adolescent pregnancy (APD: +17 ppts, 95% CI: +6 ppts, +28 ppts), education enrolment (APD: +27 ppts, 95% CI: +15 ppts, +39 ppts), literacy (AMD: +5 ppts, 95% CI: +0.2, +11), and numeracy (AMD: +8 ppts, 95% CI: +3; +13). DISCUSSION: Policies promoting HEP are likely to have supported improvements in multiple areas of adolescents' lives in Ethiopia.

From surviving to thriving: integrating mental health care into HIV, community, and family services for adolescents living with HIV.

Adolescents are a crucial generation, with the potential to bring future social and economic success for themselves and their countries. More than 90% of adolescents living with HIV reside in sub-Saharan Africa, where their mental health is set against a background of poverty, familial stress, service gaps, and an HIV epidemic that is now intertwined with the COVID-19 pandemic. In this Series paper, we review systematic reviews, randomised trials, and cohort studies of adolescents living with and affected by HIV. We provide a detailed overview of mental health provision and collate evidence for future approaches. We find that the mental health burden for adolescents living with HIV is high, contributing to low quality of life and challenges with adherence to antiretroviral therapy. Mental health provision is scarce, infrastructure and skilled providers are missing, and leadership is needed. Evidence of effective interventions is emerging, including specific provisions for mental health (eg, cognitive behavioural therapy, problem-solving, mindfulness, and parenting programmes) and broader provisions to prevent drivers of poor mental health (eg, social protection and violence prevention). We provide evidence of longitudinal associations between unconditional government grants and improved mental health. Combinations of economic and social interventions (known as cash plus care) could increase mental health benefits. Scalable delivery models include task sharing, primary care integration, strengthening families, and a pyramid of provision that differentiates between levels of need, from prevention to the care of severe disorders. A turning point has now been reached, from which complacency cannot persist. We conclude that there is substantial need, available frameworks, and a growing evidence base for action while infrastructure and skill acquisition is built.

Reproductive aspirations, contraception use and dual protection among adolescent girls and young women: the effect of motherhood and HIV status.

INTRODUCTION: There is a growing interest in adolescent motherhood and HIV among policymakers and programme implementers. To better shape services and health outcomes, we need evidence on reproductive aspirations and contraception use in this high-risk group, including the effect of motherhood and HIV status. We report data from a large survey of adolescent girls and young women conducted in a mixed rural-urban district in South Africa. METHODS: Quantitative interviews were conducted with 1712 adolescent girls and young women (ages 10 to 24): 336 adolescent mothers living with HIV (AMLHIV), 454 nulliparous adolescent girls living with HIV (ALHIV), 744 HIV-negative adolescent mothers (control adolescent mothers) and 178 HIV-negative nulliparous adolescent girls (nulliparous controls) in 2018 to 2019. Standardized questionnaires included socio-demographic measures, reproductive health and contraception experiences. Reproductive aspirations were measured as the number of children participants wanted to have. Dual protection was computed as use of both hormonal and barrier contraception or abstinence. Multivariate logistic regression and marginal effects models in STATA 15 were used to test associations between HIV status, adolescent motherhood and outcomes of reproductive aspirations, contraception use and dual protection, controlling for covariates. RESULTS AND DISCUSSION: Nearly 95% of first pregnancies were unintended. Over two-thirds of all participants wanted two or more children. Hormonal contraception, condom use and dual protection were low across all groups. In multivariate regression modelling, ALHIV were less likely to report hormonal contraception use (aOR 0.55 95% CI 0.43 to 0.70 p ≤ 0.001). In marginal effects modelling, adolescent mothers - independent of HIV status - were least likely to report condom use at last sex. Despite higher probabilities of using hormonal contraception, rates of dual protection were low: 17.1% among control adolescent mothers and 12.4% among AMLHIV. Adolescent mothers had the highest probabilities of not using any contraceptive method: 29.0% among control mothers and 23.5% among AMLHIV. CONCLUSIONS: Among adolescent girls and young women in HIV-endemic communities, reproductive aspirations and contraceptive practices affect HIV risk and infection. Tailored adolescent-responsive health services could help young women plan their pregnancies for when they are healthy and well-supported, and help interrupt the cycle of HIV transmission by supporting them to practice dual protection.

Understanding and acting on the developmental origins of health and disease in Africa would improve health across generations.

Data from many high- and low- or middle-income countries have linked exposures during key developmental periods (in particular pregnancy and infancy) to later health and disease. Africa faces substantial challenges with persisting infectious disease and now burgeoning non-communicable disease.This paper opens the debate to the value of strengthening the developmental origins of health and disease (DOHaD) research focus in Africa to tackle critical public health challenges across the life-course. We argue that the application of DOHaD science in Africa to advance life-course prevention programmes can aid the achievement of the Sustainable Development Goals, and assist in improving health across generations. To increase DOHaD research and its application in Africa, we need to mobilise multisectoral partners, utilise existing data and expertise on the continent, and foster a new generation of young African scientists engrossed in DOHaD.

Promoting a combination approach to paediatric HIV psychosocial support.

Ninety percent of the 3.4 million HIV-infected children live in sub-Saharan Africa. Their psychosocial well being is fundamental to establishing and maintaining successful treatment outcomes and overall quality of life. With the increased roll-out of antiretroviral treatment, HIV infection is shifting from a life-threatening to a chronic disease. However, even for paediatric patients enrolled in care and treatment, HIV can still be devastating due to the interaction of complex factors, particularly in the context of other household illness and overextended healthcare systems in sub-Saharan Africa.This article explores the negative effect of several interrelated HIV-specific factors on the psychosocial well being of HIV-infected children: disclosure, stigma and discrimination, and bereavement. However, drawing on clinical studies of resilience, it stresses the need to move beyond a focus on the individual as a full response to the needs of a sick child requires support for the individual child, caregiver-child dyads, extended families, communities, and institutions. This means providing early and progressive age appropriate interventions aimed at increasing the self-reliance and self-acceptance in children and their caregivers and promoting timely health-seeking behaviours. Critical barriers that cause poorer biomedical and psychosocial outcomes among children and caregiver must also be addressed as should the causes and consequences of stigma and associated gender and social norms.This article reviews interventions at different levels of the ecological model: individual-centred programs, family-centred interventions, programs that support or train healthcare providers, community interventions for HIV-infected children, and initiatives that improve the capacity of schools to provide more supportive environments for HIV-infected children. Although experience is increasing in approaches that address the psychosocial needs of vulnerable and HIV-infected children, there is still limited evidence demonstrating which interventions have positive effects on the well being of HIV-infected children. Interventions that improve the psychosocial well being of children living with HIV must be replicable in resource-limited settings, avoiding dependence on specialized staff for implementation.This paper advocates for combination approaches that strengthen the capacity of service providers, expand the availability of age appropriate and family-centred support and equip schools to be more protective and supportive of children living with HIV. The coordination of care with other community-based interventions is also needed to foster more supportive and less stigmatizing environments. To ensure effective, feasible, and scalable interventions, improving the evidence base to document improved outcomes and longer term impact as well as implementation of operational studies to document delivery approaches are needed.