TY - JOUR T1 - A comparison of levomethadyl acetate, buprenorphine, and methadone for opioid dependence JF - N Engl J Med Y1 - 2000 A1 - Johnson, RE A1 - Chutuape, MA A1 - Strain, EC A1 - Walsh, SL A1 - Stitzer, ML A1 - Bigelow, GE VL - 343 SP - 1290-1297 IS - 18 ER -