1 Department of Ophthalmology, Daegu Fatima Hospital, Daegu, Korea.
2 Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
3 Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea. nan282@snu.ac.kr.