Policy guideline on clean needle and syringe exchange.
D000163:Acquired Immunodeficiency Syndrome / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D009339:Needles / Q000600:supply & distribution; D011570:Psychiatry; D012955:Societies, Medical; D015819:Substance Abuse, Intravenous / Q000150:complications; D013594:Syringes / Q000600:supply & distribution