Name Info Provider Link
subscription/membership/fee required Atypon https://www.liebertpub.com/doi/10.1089/aid.1997.13.729?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
free resource LANL HIV Databases https://www.hiv.lanl.gov/components/sequence/HIV/search/d_search.comp?pub_pubmedentry=9168243
HIV free resource MedlinePlus Health Information https://medlineplus.gov/hiv.html