Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1472-6483(19)30837-5
Older Adult Health free resource MedlinePlus Health Information https://medlineplus.gov/olderadulthealth.html
Full text from free resource Enlighten: Publications, University of Glasgow https://eprints.gla.ac.uk/211806