1. Manchester Royal Eye Hospital, Oxford Road, Manchester M13 9WL, UK
2. Faculty of Medicine, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
3. Khoo Teck Puat Hospital, Singapore 768828, Singapore
4. Qvision, Opththalmology Department, VITHAS Almería Hospital, 04120 Almería, Spain
5. Ophthalmology Department, VITHAS Málaga, 29016 Málaga, Spain
6. Regional Universityu Hospital of Malaga, Plaza del Hospital Civil, 29010 Málaga, Spain
7. Surgery Department, University of Sevilla, 41009 Seville, Spain
8. School of Medicine, University of Málaga, 29016 Málaga, Spain