Name Info Provider Link
subscription/membership/fee required American Psychological Association http://content.apa.org/journals/com/119/3/285
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=16131257.ui