title: Impact of straight and formerly addicted counselors on client functioning.
mesh_terms: D001291:Attitude of Health Personnel; D003376:Counseling / Q000592:standards*; D004219:District of Columbia; D006556:Heroin Dependence / Q000188:drug therapy*; D006801:Humans; D008019:Life Style; D008691:Methadone / Q000627:therapeutic use*; D000078329:Workforce
chemical_list: D008691:Methadone