[1] Stanford Univ, Byers Eye Inst, Dept Ophthalmol, Palo Alto, CA USA
[2] Birat Med Coll, Dept Ophthalmol, Morang, Nepal
[3] Dr Shroff Char Eye Hosp, New Delhi, India
[4] Natl Healthgroup Eye Inst, Tan Tock Seng Hosp, Singapore, Singapore
[5] Gyeongsang Natl Univ Hosp, Jinju, South Korea