1. Isfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran
2. Department of Ophthalmology, University of Washington, Seattle, Washington, USA
3. Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
4. Department of Epidemiology and Biostatistics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
5. Department of Ophthalmology and Visual Sciences, University of Illinois Chicago College of Applied Health Sciences, Chicago, Illinois, USA
6. Isfahan Eye Research Center, Isfahan University of Medical Sciences, Isfahan, Iran