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Drug Use and Addiction free resource MedlinePlus Health Information https://medlineplus.gov/druguseandaddiction.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22843125/
subscription/membership/fee required Springer https://doi.org/10.1007/s10597-012-9537-7
free resource Europe PubMed Central https://europepmc.org/abstract/MED/22843125
Drug Use and Addiction free resource MedlinePlus Consumer Health Information https://medlineplus.gov/druguseandaddiction.html