RT Article T1 Treatment Process and Relapse to Opioid Use During Methadone Maintenance JF American journal of drug and alcohol abuse VO 20 IS 2 SP 173 OP 197 A1 Joe, G. W. A1 Simpson, D. D. A1 Sells, S. B. A2 Simpson, D. D. A2 Sells, S. B. LA English YR 1994 UL https://krimdok.uni-tuebingen.de/Record/1640308512 K1 Methadon