1. Ophthalmic Epidemiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2. Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3. Imam Hossein Medical Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
4. Department of Psychiatry, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
5. Department of Biostatistics and Epidemiology, Tehran University of Medical Sciences, Tehran, Iran.