1. Addiction and Concurrent Disorders Group, Institute of Mental Health, Centre for Health Evaluation and Outcome Sciences, Department of Psychiatry; University of British Columbia; Vancouver Canada
2. Psychiatric Research Center, Roozbeh Hospital, Department of Psychiatry; Tehran University of Medical Sciences; Tehran Iran
3. Addiction and Concurrent Disorders Group, Institute of Mental Health, Department of Psychiatry; University of British Columbia; Vancouver Canada
4. Health Information Management and Technology Group; Shahid Beheshti University of Medical Sciences; Tehran Iran
5. Department of Psychiatry (UPK), Division of Addictive Disorders; University of Basel; Basel Switzerland
6. Kian Methadone Maintenance Treatment Clinic, Private Practice and Mazandaran University of Medical Sciences; Sari Mazandaran Iran
7. Rooz-e-No Methadone Maintenance Treatment Clinic, Private Practice and Shiraz University of Medical Sciences; Shiraz Fars Iran
8. Psychosomatic Research Center; Isfahan University of Medical Sciences; Isfahan Iran
9. Sales, Marketing, Export, and Medical Department; Darou Pakhsh Pharmaceutical Mfg.Co.; Tehran Iran
10. Pharmacovigilance & Clinical Trial Manager, Darou Pakhsh Pharmaceutical Mfg Co.; Tehran Iran
11. Department of Health Management and Economics, School of Medicine; AJA University of Medical Sciences; Tehran Iran
12. Department of Psychology; AJA University of Medical Sciences; Tehran Iran
13. Institute of Mental Health, Department of Psychiatry, Faculty of Medicine; University of British Columbia; Vancouver Canada