1. Department of Public Health School of Public Health and Safety and Environmental and Occupational Hazards Control Research Center Shahid Beheshti University of Medical Sciences Tehran Iran
2. Department of Microbiology School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran
3. School of Dentistry Clinician Scientist of Dental Materials and Restorative Dentistry Shahid Beheshti University of Medical Sciences Tehran Iran
4. Department of Psychiatry Taleghani Hospital Research Development Committee Shahid Beheshti University of Medical Sciences Tehran Iran