1. London School of Hygiene & Tropical Medicine; Cochrane Eyes and Vision, ICEH; Keppel Street London UK WC1E 7HT
2. London School of Hygiene & Tropical Medicine; Clinical Research Department, Faculty of Infectious and Tropical Diseases; London UK
3. King George's Medical University; Department of Pharmacology; Lucknow UP India 226003
4. Health Technology Assessment Institute; Developing Clinical Practice Guidelines; Autopista Norte # 118-30 Off 201 Bogotá Colombia 110111
5. King George's Medical University; Department of Prosthodontics, Crowns and Bridges; Shahmina Road Faculty of Dental Sciences Lucknow Uttar Pradesh India 226003
6. King George's Medical University; Department of Ophthalmology; Lucknow India