[1] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Ophthalmol, Sch Med, Seoul 03181, South Korea
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Ophthalmol, Seoul 05505, South Korea
[3] Konyang Univ, Kims Eye Hosp, Myung Gok Eye Res Inst, Dept Ophthalmol, Seoul 07301, South Korea
[4] Chonnam Natl Univ, Dept Ophthalmol, Med Sch & Hosp, Gwangju 61469, South Korea
[5] Chonnam Natl Univ, Res Inst Med Sci, Med Sch & Hosp, Gwangju 61469, South Korea
[6] Seoul Natl Univ, Coll Med, Dept Ophthalmol, Bundang Hosp, Seongnam 13620, South Korea
[7] Seoul Natl Univ, Seoul Natl Univ Hosp, Dept Ophthalmol, Coll Med, Seoul 03080, South Korea
[8] Catholic Univ Korea, Coll Med, Dept Ophthalmol, Seoul St Marys Hosp, Seoul 06591, South Korea
[9] Ajou Univ, Dept Ophthalmol, Sch Med, Suwon 16499, South Korea
[10] Korea Univ, Dept Ophthalmol, Coll Med, Seoul 02841, South Korea
[11] Yonsei Univ, Severance Hosp, Inst Vis Res, Dept Ophthalmol,Coll Med, Seoul 03722, South Korea