TY - JOUR T1 - The role of program directors in treatment practices: The case of methadone dose patterns in U.S. outpatient opioid agonist treatment programs AU - Frimpong, Jemima A. AU - Shiu-Yee, Karen AU - D'Aunno, Thomas PY - 2017 DO - 10.1111/1475-6773.12558 SP - 1881 EP - 1907 JO - Health Services Research VL - 52 IS - 5 SN - 0017-9124 ER -