1. Center for Healthcare Data Modeling Departments of Biostatistics and Epidemiology School of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran
2. Department of Biostatistics Shahid Beheshti University of Medical Sciences Tehran Iran
3. Department of Community Health Sciences University of Manitoba Winnipeg MB R3E 0W3Canada
4. Department of Epidemiology School of Public Health and Safety Shahid Beheshti University of Medical SciencesTehranIran