1. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
2. Department of Psychiatric Nursing and Management, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Department of Epidemiology, School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
4. Ophthalmic Epidemiology Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
5. Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
6. Iribarren Eye Consultants, Buenos Aires, Argentina
7. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran