1. Advanced Eye Center, Post Graduate Institute of Medical Education and Research, Chandigarh, India
2. Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India
3. National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore
4. Moorfields Eye Hospital, NHS Foundation Trust, London, UK
5. Department of Microbiology, Division of Mycobacteriology, Post Graduate Institute of Medical Education and Research, Chandigarh, India