Safe injection sites.
D003153:Community Health Services / Q000458:organization & administration*; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control; D006526:Hepatitis C / Q000453:epidemiology / Q000517:prevention & control; D006801:Humans; D012309:Risk-Taking; D017751:Safety Management / Q000458:organization & administration*; D015819:Substance Abuse, Intravenous / Q000453:epidemiology; D013594:Syringes