Name Info Provider Link
Herbal Medicine free resource MedlinePlus Health Information https://medlineplus.gov/herbalmedicine.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=10540301.ui
free resource Wiley https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1360-2276&date=1999&volume=4&issue=9&spage=611