R. Rambe, U. Harahap, and C. Julita Tarigan, “INFLUENCE OF DOSAGE ON RETENTION IN PATIENTS METHADONE MAINTENANCE THERAPY PROGRAM FOR MAINTENANCE PHASE OF H. ADAM MALIK MEDAN CENTRAL GENERAL HOSPITAL”, Asian J Pharm Clin Res, vol. 11, no. 8, pp. 244–247, Aug. 2018.