1. Department of Health Education, School of Health Shahid Beheshti University of Medical Sciences Tehran Iran
2. Department of Public Health, Qaen School of Medical Sciences Birjand University of Medical Sciences Birjand Iran
3. Department of Public Health Shahid Beheshti University of Medical Sciences Tehran Iran
4. Department of Endodontics, School of Dentistry Aja University of Medical Sciences Tehran Iran
5. Department of Biostatistics Shiraz University of Medical Sciences Shiraz Iran
6. Department of English Language Kurdistan University of Medical Sciences Sanandaj Iran