Lung Transplantation in Controlled Donation after Circulatory-Determination-of-Death Using Normothermic Abdominal Perfusion.

The main limitation to increased rates of lung transplantation (LT) continues to be the availability of suitable donors. At present, the largest source of lung allografts is still donation after the neurologic determination of death (brain-death donors, DBD). However, only 20% of these donors provide acceptable lung allografts for transplantation. One of the proposed strategies to increase the lung donor pool is the use of donors after circulatory-determination-of-death (DCD), which has the potential to significantly alleviate the shortage of transplantable lungs. According to the Maastricht classification, there are five types of DCD donors. The first two categories are uncontrolled DCD donors (uDCD); the other three are controlled DCD donors (cDCD). Clinical experience with uncontrolled DCD donors is scarce and remains limited to small case series. Controlled DCD donation, meanwhile, is the most accepted type of DCD donation for lungs. Although the DCD donor pool has significantly increased, it is still underutilized worldwide. To achieve a high retrieval rate, experience with DCD donation, adequate management of the potential DCD donor at the intensive care unit (ICU), and expertise in combined organ procurement are critical. This review presents a concise update of lung donation after circulatory-determination-of-death and includes a step-by-step protocol of lung procurement using abdominal normothermic regional perfusion.

New Cable Delay Measurement System for VGOS Stations.

This paper presents the new cable delay measurement system (CDMS) designed at Yebes Observatory (IGN, Spain), which is required for the VLBI Global Observing System (VGOS) stations. This system measures the phase difference between the 5 MHz reference signal from the hydrogen maser and the 5 MHz signal that reaches the broadband receiver through a coaxial cable, for the generation of calibration tones. As a result, the system detects the changes in the length of that coaxial cable due to temperature variations along the cable run and flexures caused by VGOS radio telescope movements. This CDMS outperforms the previous versions: firstly, it does not require a frequency counter for phase/delay measurements; secondly, it largely reduces the use of digital circuits; hence, reducing digital noise; and thirdly, it has a remotely controlled automatic calibration subsystem. The system was tested in the laboratory and in the radio telescope, and the measurements of both set-ups are shown. These measurements include the total noise, accuracy, hysteresis, and stability. The results in the radio telescope can be correlated with the different factors that affect the cable, such as temperature and flexures. The system allows to achieve an RMS noise of less than 0.5 ps, significantly improving the requirements established in VGOS. The system is currently installed in the Red Atlántica de Estaciones Geodinámicas y Espaciales (RAEGE)Yebes VGOS 13.2 m radio telescope, and will be installed in the Norwegian Mapping Authority (NMA) twin VGOS radio telescopes, in the Finnish Geospatial Research Institute (FGI) VGOS station and in the RAEGE Santa María VGOS radio telescope (Açores, Portugal).

Efficacy and safety of tofacitinib in the treatment of ulcerative colitis: real-life experience in Andalusia.

BACKGROUND: tofacitinib is a Janus kinase inhibitor approved for the treatment of moderate-severe ulcerative colitis (UC). This study aimed to evaluate its efficacy in a real-life setting. METHODS: a retrospective and multicenter observational study was performed with UC patients treated with tofacitinib. Short and long-term treatment effectiveness, treatment survival, need for dose escalation and safety were analyzed. Clinical response and remission were defined in accordance with the partial Mayo score. RESULTS: seventy-four patients were included, 98.3 % had received prior biological treatment, 55.4 % with three or more biologicals and up to 64.9% with two or three different mechanisms of action. Clinical remission and response rates were 37.8 % and 77 % at eight weeks, and 41.8 % and 70.1 % at 16 weeks. With regard to non-responders at eight weeks, 37.5 % achieved a delayed clinical response at 16 weeks. Mean treatment duration was 19 months (95 % CI: 16-22), with a treatment survival of 56 % at 28 months, and remission and response rates at 24 months of 53.8 % and 61.5 %. Twenty-three treatments were withdrawn, most of them (18) during the induction period. There were adverse events in a quarter of the patients; only four were severe and led to treatment discontinuation. CONCLUSION: tofacitinib has a demonstrated efficacy in clinical practice to induce and maintain clinical response in treatment-refractory UC patients, with an acceptable safety profile.

Pilot Trial of the Performance of Electrocardiogram in the Evaluation of Childhood Syncope in the Emergency Department.

INTRODUCTION: The electrocardiogram (ECG) is widely considered a standard part of the syncope workup, and it is recommended to be obtained in all children with syncope. Nevertheless, a newly recognized cardiac cause is rare and largely incidental findings are commonly seen, leading to unneeded worry, additional testing, and added health care costs. OBJECTIVE: The aim of this study was to analyze the performance of ECG in the evaluation of childhood syncope in the emergency department (ED). METHODS: This was a descriptive, retrospective, multicenter pilot study of patients younger than 14 years diagnosed with syncope in which an ECG was obtained in the ED in 2015 and 2016. RESULTS: During the study period, 440 patients were diagnosed with syncope, of which an ECG was performed in 197 (44.7%). Of these, 64 (32.5%) were related to any concerning features associated with the event, including 33 occurring during or after physical exertion. No major alteration of the ECG was noted, and the ECG revealed multiple minor findings in 38 (19.2%; 95% confidence interval, 14.4-25.4). Twenty-five (12.7%) children were referred to a pediatric cardiologist. No patient was noted to have a previously undiagnosed cardiac cause of syncope. CONCLUSIONS: A newly recognized cardiac cause is extremely rare among children evaluated for syncope in the ED, and ECG is not systematically obtained in this population. Larger studies are needed to clarify if it is possible to identify a group of children that can be safely managed without a systematic ECG. Best practices need to be better implemented for an adequate management of pediatric syncope in the ED.

A Tri-Band Cooled Receiver for Geodetic VLBI.

This paper shows a simultaneous tri-band (S: 2.2-2.7 GHz, X: 7.5-9 GHz and Ka: 28-33 GHz) low-noise cryogenic receiver for geodetic Very Long Baseline Interferometry (geo-VLBI) which has been developed at Yebes Observatory laboratories in Spain. A special feature is that the whole receiver front-end is fully coolable down to cryogenic temperatures to minimize receiver noise. It was installed in the first radio telescope of the Red Atlántica de Estaciones Geodinámicas y Espaciales (RAEGE) project, which is located in Yebes Observatory, in the frame of the VLBI Global Observing System (VGOS). After this, the receiver was borrowed by the Norwegian Mapping Autorithy (NMA) for the commissioning of two VGOS radiotelescopes in Svalbard (Norway). A second identical receiver was built for the Ishioka VGOS station of the Geospatial Information Authority (GSI) of Japan, and a third one for the second RAEGE VGOS station, located in Santa María (Açores Archipelago, Portugal). The average receiver noise temperatures are 21, 23, and 25 Kelvin and the measured antenna efficiencies are 70%, 75%, and 60% in S-band, X-band, and Ka-band, respectively.

[Prevalence of subjective memory complaints: Population study in Spain]. / Prevalencia de quejas subjetivas de memoria: estudio poblacional en España.

INTRODUCTION: Subjective memory complaints (SMC) might be an early sign of further deterioration in cognitive functions. However, no population studies have been published covering all Spain to determine the SMC prevalence. The objective of the present study was to determine the SMC prevalence in the general population residing in Spain >50 years of age and also which related actions were done. MATERIALS AND METHODS: Interviews were conducted with a nationally representative sample >50 years of age using an online/computer assisted web interview (CAWI) questionnaire. The survey consisted of 34 items divided into two blocks. Presence of SMC was considered when in question 1 the subject answered that "Yes" he had some memory problem. RESULTS: Two thousand three hundred people (53.7% women; 23.9% ≥75 years old) were interviewed. 31% answered that they considered they had a memory problem (no differences between sexes, mean time with memory problems of 3.0 years). A higher prevalence of SMC was observed in ≥75 years old (44%). 90% did not include any specific foods in their diet for their memory problems, neither were taking any pharmaceuticals, diet supplements or nutritional supplements (92%). 78% of those interviewed with SMC have not consulted health professionals for their memory problems. CONCLUSIONS: SMC are considerably prevalent in our environment affecting almost a third of people ≥50 years of age. Most of the interviewees with SMC did not go to health professionals to manage their SMC.

Non-dipping blood pressure pattern in pediatricians during on-duty.

INTRODUCTION: People with a reduced nighttime dip in blood pressure have an increased cardiovascular risk. Our objective was to describe the different patterns in blood pressure (BP) among pediatricians who work in long on-duty shifts in relation with sex, medical rank and sleeping time. METHODS: Descriptive, cross-sectional, two-center study. On duty pediatric Resident physicians and pediatric Consultants were recruited between January 2018 and December 2021. RESULTS: Fifty-one physicians were included in the study (78.4% female, 66.7% Resident physicians). Resident physicians had a higher night/day ratio (0.91 vs 0.85; p<0.001) and a shorter nighttime period (3.87 vs 5.41, p<0.001) than Consultants. Physicians sleeping less than 5h had a higher night/day ratio (0.91 vs 0.87, p=0.014). Being a Resident showed a ∼4.5-fold increased risk of having a non-dipping BP pattern compared to Consultants. CONCLUSION: We found a potential link between both being a Resident and, probably, having shorter sleeping time, and the non-dipping BP pattern in physicians during prolonged shifts.

A new surgical technique for sutureless partial nephrectomy: renal sutureless device.

BACKGROUND: Several factors impact the preservation of renal function after partial nephrectomy. Warm ischemia time is the main modifiable surgical factor. Renorrhaphy represents the key of hemostasia, but it is associated with increase of warm ischemia time and complications. The aim of this study was to describe our initial surgical experience with a new surgical technique for sutureless partial nephrectomy, based on the application of our own developed renal-sutureless-device-RSD. METHODS: Between 2020-2021, 10 patients diagnosed with renal cell carcinoma stage cT1a-b cN0M0 with an exophytic component were operated using renal-sutureless-device-RSD. Surgical technique of sutureless partial nephrectomy with renal-sutureless-device-RSD is described in a step-by-step fashion. Clinical data was collected in a dedicated database. Presurgical, intraoperative, postoperative variables, pathology and functional results were evaluated. Medians and ranges of values for selected variables were reported as descriptive statistics. RESULTS: Partial nephrectomy was carried out with the use of renal-sutureless-device-RSD without renorrhaphy in all cases (70%cT1a-30%cT1b). Median tumor size was 3.15 cm (IQR: 2.5-4.5). R.E.N.A.L Score had a range between 4a-10. Median surgical time was 97.5 minutes (IQR 75-105). Renal artery clamping was only required in 4 cases, with a median warm ischemia time of 12.5 minutes (IQR 10-15). No blood transfusion, intraoperative and postoperative complications were noted. Free-of-disease margin rate achieved was 90%. Median length of stay was 2 days (IQR 2-2). Laboratory data on hemoglobin and hematocrit levels, as well as renal function tests, remained stable after partial nephrectomy. CONCLUSIONS: Our initial experience suggests that a sutureless PN using the RSD device is feasible and safe. Further investigation is needed to determine the clinical benefit of this technique.

Bioavailability of Oniria®, a Melatonin Prolonged-Release Formulation, Versus Immediate-Release Melatonin in Healthy Volunteers.

BACKGROUND: Melatonin is an endogenous substance which plays a key role in sleep induction by reducing sleep onset latency; it has been approved by the European Food Safety Authority as a food supplement for exogenous administration. Oniria® is a food supplement formulated as 1.98 mg of prolonged-release melatonin tablets; it displays a dual dissolution profile in vitro. OBJECTIVES: The main objective of the present study was to evaluate the relative oral bioavailability of Oniria®, in comparison with immediate-release tablets (IRT) with a similar melatonin content as a reference. We also attempted to characterize the circadian rhythm of endogenous melatonin. METHODS: We performed an open-label, cross-over, randomized, phase I clinical study with two sequences and three periods involving 14 healthy volunteers. We characterized the endogenous melatonin circadian profile (period 1) and pharmacokinetics (PK) of both Oniria® and the reference melatonin (periods 2 and 3). RESULTS: Two phases were clearly differentiated in the PK profile of Oniria®. An initial one, from dosing up to 2 h, and a delayed one from 2 to 11 h post-administration. During the initial phase, both melatonin formulations were equivalent, with a Cmax value close to 4000 pg/mL. However, in the delayed phase, Oniria® showed significantly higher melatonin concentrations than the IRT (three times higher at 4-6 h post-administration). Moreover, Oniria® exhibited concentrations above the endogenous melatonin peak of 80 pg/mL for up to 2.5 h versus the reference formulation, potentially suggesting an effect of Oniria®, not only in the induction of sleep, but also in the maintenance. CONCLUSION: Oniria® could be a highly promising food supplement, not only for sleep induction but also for the maintenance of sleep.

Long-Term Real-World Effectiveness and Safety of Ustekinumab in Crohn's Disease Patients: The SUSTAIN Study.

BACKGROUND: Large real-world-evidence studies are required to confirm the durability of response, effectiveness, and safety of ustekinumab in Crohn's disease (CD) patients in real-world clinical practice. METHODS: A retrospective, multicentre study was conducted in Spain in patients with active CD who had received ≥1 intravenous dose of ustekinumab for ≥6 months. Primary outcome was ustekinumab retention rate; secondary outcomes were to identify predictive factors for drug retention, short-term remission (week 16), loss of response and predictive factors for short-term efficacy and loss of response, and ustekinumab safety. RESULTS: A total of 463 patients were included. Mean baseline Harvey-Bradshaw Index was 8.4. A total of 447 (96.5%) patients had received prior biologic therapy, 141 (30.5%) of whom had received ≥3 agents. In addition, 35.2% received concomitant immunosuppressants, and 47.1% had ≥1 abdominal surgery. At week 16, 56% had remission, 70% had response, and 26.1% required dose escalation or intensification; of these, 24.8% did not subsequently reduce dose. After a median follow-up of 15 months, 356 (77%) patients continued treatment. The incidence rate of ustekinumab discontinuation was 18% per patient-year of follow-up. Previous intestinal surgery and concomitant steroid treatment were associated with higher risk of ustekinumab discontinuation, while a maintenance schedule every 12 weeks had a lower risk; neither concomitant immunosuppressants nor the number of previous biologics were associated with ustekinumab discontinuation risk. Fifty adverse events were reported in 39 (8.4%) patients; 4 of them were severe (2 infections, 1 malignancy, and 1 fever). CONCLUSIONS: Ustekinumab is effective and safe as short- and long-term treatment in a refractory cohort of CD patients in real-world clinical practice.

This large retrospective study demonstrated the short- and long-term effectiveness and safety of ustekinumab in patients with Crohn's disease in real-world clinical practice, including those with refractory disease.

Using Interpretable Machine Learning to Identify Baseline Predictive Factors of Remission and Drug Durability in Crohn's Disease Patients on Ustekinumab.

Ustekinumab has shown efficacy in Crohn's Disease (CD) patients. To identify patient profiles of those who benefit the most from this treatment would help to position this drug in the therapeutic paradigm of CD and generate hypotheses for future trials. The objective of this analysis was to determine whether baseline patient characteristics are predictive of remission and the drug durability of ustekinumab, and whether its positioning with respect to prior use of biologics has a significant effect after correcting for disease severity and phenotype at baseline using interpretable machine learning. Patients' data from SUSTAIN, a retrospective multicenter single-arm cohort study, were used. Disease phenotype, baseline laboratory data, and prior treatment characteristics were documented. Clinical remission was defined as the Harvey Bradshaw Index ≤ 4 and was tracked longitudinally. Drug durability was defined as the time until a patient discontinued treatment. A total of 439 participants from 60 centers were included and a total of 20 baseline covariates considered. Less exposure to previous biologics had a positive effect on remission, even after controlling for baseline disease severity using a non-linear, additive, multivariable model. Additionally, age, body mass index, and fecal calprotectin at baseline were found to be statistically significant as independent negative risk factors for both remission and drug survival, with further risk factors identified for remission.

Minimally Invasive Laparoscopic Technique for Lymph Node Dissection in Penile Cancer: The Pelvic and Inguinal Single-Site Approach: PISA Technique.

BACKGROUND: Lymph node dissection(LND) remains the gold standard in the staging and treatment of locally advanced penile cancer(PC)1. OBJECTIVE: To describe our initial experience with a new minimally invasive inguinal and pelvic single-access laparoscopic approach2,for performing LND in PC, first described in Urology by our group in 20153: the Pelvic and Inguinal Single Access(PISA) technique (Fig. 1). MATERIAL: Between 2015 and 2018, 10 consecutive patients with different PC stages and indication of inguinal LND (cN0 and ≥pT1G3 or cN1/cN2)1 were operated by means of the PISA technique (Table 1). Intraoperative frozen section(FS)4 analysis was carried out routinely and if ≥2 inguinal nodes(pN2) or extracapsular nodal extension(pN3) are detected1,5, ipsilateral pelvic LND was performed sequentially as a single-stage procedure and using the same surgical incisions. If this condition occurs bilaterally in the inguinal LND, the pelvic LND will be bilateral. The video shows the PISA technique in a step-by-step. Instrumental requirements: 30°laparoscopy optic, monopolar scissors,Ligasure (Covidien Surgical,Minneapolis,MN,USA) vascular sealant, extraction-bag, bipolar forceps and 5-mm endo-clip(Hem-o-lok)are required. RESULTS: Intraoperative and postsurgical variables are shown in Table 2. Inguinal LND was bilateral in all cases. Pelvic LND was required in 40% of patients. Total operative time was 120-170 minutes. Median estimated blood loss(EBL) was 66(30-100)cc, but no blood transfusion was required. No intraoperative complications were noted. 40% of patients had postoperative complications (10% major complication- symptomatic inguinal lymphocele). Median lenght of hospital stay(LOS)was 5.8(3-10) days. Median inguinal drain removal was 4.7 days. The pathological analysis outcomes are shown in Table 3. Mean number of lymph nodes removed by inguinal LND was 10.25(8-14). CONCLUSION: PISA technique allow a minimally invasive inguinal and pelvic LND using the same set of incisions and carry it out in the same surgical procedure. PISA technique in PC LND seems to be safe, with a low rate of major complications and preserving oncological efficacy.

[Recurrent peripheral facial nerve palsy]. / Parálisis facial periférica recurrente.

BACKGROUND: Melkersson-Rosenthal syndrome is a rare disorder that is characterized, in its full form, by recurrent facial nerve palsy, fissured tongue, and orofacial edema. Most cases present as oligosymptomatic or monosymptomatic forms. Its etiology is still unknown and its course is chronic and it may be progressive. CASE REPORT: We present the case of a nine-year-old girl with recurrent episodes of peripheral facial nerve palsy. During the study, lip edema, benign migratory glossitis, and angular cheilitis were observed, which is why a clinical diagnosis of Melkersson-Rosenthal syndrome was made. CONCLUSIONS: This syndrome must be considered in the differential diagnosis with the presence of acute peripheral facial nerve palsy and/or facial edema due to its behavior and progressive evolution.

Antecedentes: El síndrome de Melkersson-Rosenthal es una entidad poco frecuente caracterizada, en su forma completa, por parálisis facial recurrente, lengua fisurada y edema orofacial. La mayoría de los casos se presentan como formas oligosintomáticas y monosintomáticas. Su etiología es aún desconocida y tiene un curso crónico que puede ser progresivo. Caso clínico: Presentamos el caso de una niña de nueve años de edad con episodios recurrentes de parálisis facial periférica. Durante su estudio se observó edema labial, glositis migratoria benigna y queilitis angular, por lo que se formuló el diagnóstico clínico de síndrome de Melkersson-Rosenthal. Conclusión: Debemos considerar este síndrome dentro del diagnóstico diferencial ante la presencia de parálisis facial periférica recurrente o edema facial, debido a su comportamiento y evolución progresiva.

Early Surgical Management of Bronchial Dehiscence After Single-Lung Transplantation: A Case Report.

Anastomotic airway complications after lung transplantation affect up to 20% of patients. Bronchial stenosis is the most frequent complication, while dehiscence of bronchial anastomosis is a rarely seen complication, with report incidences between 1% and 10%. Despite its low incidence, dehiscence of bronchial anastomoses remains a disastrous complication in the posttransplantation period without a well-established management protocol. We present a challenging case of complete bronchial dehiscence after unilateral lung transplantation in a patient with interstitial lung fibrosis (ILF) that occurred on postoperative day 10. The dehiscence was diagnosed early and the patient's status was stable for repeat thoracotomy, therefore, an early surgical approach was preferable to conservative management or bronchoscopy. Aggressive early surgical management in a stable patient allows for complete debridement with removal of the detritus that impedes correct anastomosis healing and permits the removal of microbial vegetations with successful results.

[Solitary morphea profunda: An unusual form of localized scleroderma in childhood. Case report]. / Morfea profunda solitaria: Una forma infrecuente de esclerodermia localizada en la infancia. Caso clínico.

Solitary morphea profunda is an unusual form of localized scleroderma in childhood. It is characterized by a single, poorly defined and indurate plaque often located on the upper trunk near the spine. Solitary morphea profunda is frequently asymptomatic and shows no associated systemic involvement. Histological examination reveals dense sclerosis of collagen and a marked lymphocytic infiltrate in the reticular dermis and subcutis. We report a 7-year-old girl with a solitary asymptomatic and sclerotic plaque on the back. Clinical, ultrasonographic and histological features were consistent with solitary morphea profunda.

La morfea profunda solitaria es una forma infrecuente de morfea localizada en la infancia. Se caracteriza clínicamente por la presencia de un área indurada, mal delimitada y asintomática, de localización paraespinal, que no tiende a la progresión ni se asocia con manifestaciones sistémicas. Histológicamente, muestra un engrasamiento e hialinización de las fibras de colágeno dérmico, junto con infiltrados de predominio linfohistiocitario en la dermis reticular y la hipodermis. Se presenta a una paciente de 7 años con una lesión solitaria en la región dorsal media izquierda, cuyos hallazgos clínicos, ecográficos e histológicos fueron compatibles con el diagnóstico de una morfea profunda solitaria.

[Food Protein Induced Enterocolitis Syndrome due to ingestion of kiwi causing potentially severe unexplained event in a child]. / Síndrome de enterocolitis inducida por proteínas alimentarias por ingesta de kiwi como causa de evento potencialmente grave inexplicado en una niña.

Food protein-induced enterocolitis syndrome (FPIES) is a non-IgE food allergy manifesting as profuse, repetitive vomiting, sometimes with diarrhea, leading to dehydration and lethargy that can be severe and lead to shock. Despite the potential severity, awareness of FPIES is low and diagnosis is often delayed, especially in those triggered by solid foods. Presence of vomits and duration of more than 1 minute are the key differential factors to distinguish FPIES from brief resolved unexplained events. We report a case of a 6-month-old infant finally diagnosed as having kiwi induced FPIES.

El síndrome de enterocolitis inducida por proteínas alimentarias es una alergia alimentaria no mediada por inmunoglobulina E que se manifiesta clínicamente con vómitos profusos y repetitivos, en ocasiones, asociados a diarrea, y puede llegar a asociar deshidratación y letargia, con riesgo de desarrollo de shock. A pesar de su potencial gravedad, el índice de sospecha de este síndrome es bajo, lo que demora su diagnóstico, especialmente, en aquellos casos que son desencadenados por alimentos sólidos. La presencia de vómitos y la duración de más de un minuto son los datos clave que pueden diferenciarlo de los episodios breves, resueltos e inexplicados. Se presenta el caso de una lactante de 6 meses de vida con diagnóstico final de síndrome de enterocolitis inducida por proteínas alimentarias por ingesta de kiwi.

[Nummular dermatitis: report of two cases in children]. / Dermatitis numular: presentación de dos casos pediátricos.

Nummular eczema or dermatitis is an uncommon paediatric pathology. It is presented as red-purplish small papules and vesicles that join to form exudative circular patches and then to eczematous or lichenified patches with discoid shape. The lesions appear predominantly on the extensor surface of extremities, although they can appear in trunk, hands or feet. This pathology has a clinical diagnosis; only few cases require complementary test. The topical corticosteroids are the mainstay of the treatment, and the causal treatment whether an infectious trigger is found. The patients have chronic or recurrent evolution. We report two cases in children with the aim of spreading knowledge among pediatricians.

La dermatitis o eccema numular es una patología poco frecuente en pediatría. El cuadro se caracteriza por un inicio con diminutas pápulas y vesículas eritematovioláceas que confluyen en placas exudativas de forma circular y evolucionan a placas eccematosas o liquenificadas de forma discoide o anular. Aparecen, predominantemente, en superficies extensoras de las extremidades, aunque pueden encontrarse en el tronco, las manos o los pies. El diagnóstico es clínico; solo en casos con mala evolución pueden ser necesarias pruebas complementarias. La base del tratamiento son los corticoides tópicos y, si se encuentra un desencadenante infeccioso, el tratamiento de la causa. Su evolución suele ser crónica o recidivante. Se presentan dos casos clínicos en población pediátrica con la finalidad de difundir entre los pediatras su conocimiento y manejo.