| Name | Info | Provider | Link |
|---|---|---|---|
| Skin Aging | free resource | MedlinePlus Health Information | https://medlineplus.gov/skinaging.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=8746334.ui | |
| subscription/membership/fee required | Wiley | https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0007-0963&date=1996&volume=134&issue=2&spage=229 |