Name Info Provider Link
subscription/membership/fee required Atypon https://www.ahajournals.org/doi/10.1161/01.atv.20.10.2255?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Older Adult Health free resource MedlinePlus Health Information https://medlineplus.gov/olderadulthealth.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=11031212.ui