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Full text from the Univ. of Michigan Library free resource MLibrary (Deep Blue) http://hdl.handle.net/2027.42/154284
LGBTQIA+ Health free resource MedlinePlus Health Information https://medlineplus.gov/lgbtqiahealth.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31599027.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31599027/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/31599027
subscription/membership/fee required Wiley https://doi.org/10.1111/add.14819
Drug Use and Addiction free resource MedlinePlus Consumer Health Information https://medlineplus.gov/druguseandaddiction.html