title: Decreased serum testosterone concentration in male heroin and methadone addicts.
mesh_terms: D000293:Adolescent; D000328:Adult; D004958:Estradiol / Q000097:blood; D005640:Follicle Stimulating Hormone / Q000097:blood; D006556:Heroin Dependence / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D008691:Methadone; D008875:Middle Aged; D019966:Substance-Related Disorders / Q000097:blood*; D013739:Testosterone / Q000097:blood
chemical_list: D013739:Testosterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D008691:Methadone