1. Moorfields Eye Hospital; City Road London UK EC1V 2PD
2. Singapore National Eye Centre; c/o Prof D Tan; 11 Third Hospital Avenue Singapore Singapore 168751
3. London School of Hygiene & Tropical Medicine; Cochrane Eyes and Vision Group, ICEH; Keppel Street London UK WC1E 7HT
4. London School of Hygiene and Tropical Medicine; Department of Infectious and Tropical Diseases; Clinical Research Unit Keppel Street London UK WC1E 7HT
5. Aravind Eye Hospital; 1 Anna Nagar Madurai India 625 020
6. Forskningsparken Breivilka; Centre for International Health; University of Tromsø Tromsø Norway 9037