1. The Division of Ophthalmology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
2. The Department of Ophthalmology, California Pacific Medical Center, San Francisco, California, USA
3. The Department of Ophthalmology, Stanford University School of Medicine, Stanford, California, USA
4. The Francis I. Proctor Foundation, UCSF School of Medicine, San Francisco, California, USA
5. The Department of Ophthalmology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
6. The Department of Epidemiology, The Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
7. The Department of Ophthalmology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
8. Eye Protection Foundation Bayrampasa Eye Hospital, Istanbul, Turkey