Name Info Provider Link
subscription/membership/fee required Atypon https://journals.sagepub.com/doi/10.1177/003335491212700607?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
HIV free resource MedlinePlus Health Information https://medlineplus.gov/hiv.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=23115382.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23115382/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/23115382