1. Noor Research Center for Ophthalmic Epidemiology Noor Eye Hospital Tehran Iran
2. Department of Medical Surgical Nursing, School of Nursing and Midwifery Shahid Beheshti University of Medical Sciences Tehran Iran
3. Noor Ophthalmology Research Center Noor Eye Hospital Tehran Iran
4. Ophthalmic Epidemiology Research Center Shahroud University of Medical Sciences Shahroud Iran
5. Department of Epidemiology and Biostatistics, School of Public Health Tehran University of Medical Sciences Tehran Iran