1. Department of Ophthalmology, Mbagathi Hospital, Nairobi, Kenya
2. International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
3. Eyu-Ethiopia: Eye Health Research, Training and Service Centre, Bahir Dar, Ethiopia
4. Department of Ophthalmology, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
5. Department of Ophthalmology, Kenya Medical Training College, Nairobi, Kenya