The Effect of Patients’ Characteristics and the Dosage of Methadone Maintenance on Retention of Methadone Therapy in H. Adam Malik General Hospital, Medan. INDONES J MED [Internet]. 2019 Mar. 10 [cited 2026 Oct. 25];4(2):176-82. Available from: https://www.theijmed.com/index.php/theijmed/article/view/190