Name Info Provider Link
free resource Atypon https://www.acpjournals.org/doi/abs/10.7326/0003-4819-148-1-200801010-00196?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Choosing a Doctor or Health Care Service free resource MedlinePlus Health Information https://medlineplus.gov/choosingadoctororhealthcareservice.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18056654.ui