1. Tehran Heart Center, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
2. Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
3. Department of General and Vascular Surgery, Shahid Beheshti University of Medical Sciences and Health Services, Shohada-e-Tajrish Hospital, Tehran, Iran.
4. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.