1. Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
2. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
3. Stein Eye Institute, University of California, Los Angeles, CA, USA
4. Center for Health Related Social and Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran
5. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran