Name Info Provider Link
subscription/membership/fee required Atypon https:///www.science.org/doi/10.1126/scitranslmed.adg6050?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Vaccines free resource MedlinePlus Health Information https://medlineplus.gov/vaccines.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=37611082.ui