1. The Department of Ophthalmology, California Pacific Medical Center, San Francisco, California, USA
2. The Department of Ophthalmology, Stanford University School of Medicine, Stanford, California, USA
3. The Francis I. Proctor Foundation, UCSF School of Medicine, San Francisco, California, USA
4. The Department of Ophthalmology, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, Brazil
5. Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
6. Division of Ophthalmology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa