Secondary drug use among heroin users.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000661:Amphetamine; D001463:Barbiturates; D002188:Cannabis; D003042:Cocaine; D003415:Crime; D004522:Educational Status; D005006:Ethnicity; D003932:Heroin; D006801:Humans; D008238:Lysergic Acid Diethylamide; D008297:Male; D008614:Meperidine; D008691:Methadone; D008875:Middle Aged; D009021:Morphine Dependence / Q000150:complications*; D009518:New York; D009892:Opium; D019966:Substance-Related Disorders
D001463:Barbiturates; D003932:Heroin; D009892:Opium; D008238:Lysergic Acid Diethylamide; D008614:Meperidine; D000661:Amphetamine; D003042:Cocaine; D008691:Methadone