A Randomized Pilot Trial of Contingency-management Intervention for Patients in during Methadone Maintenance Treatment, Cash vs. Vouchers

Affiliations

• ¹ Dept. of Psychology, Faculty of Humanities, University of Science and Culture, Tehran, Iran.
• ² Behavioral Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
• ³ Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran.
• ⁴ Technical Assistant in Bijan Center for Substance Abuse Treatment, Tehran, Iran.
• ⁵ Dept. of Psychology, Branch of Hamedan, Islamic Azad University, Hamadan, Iran.
• ⁶ Dept. of Psychiatry, Behavior Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.