1. Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea
2. Department of Ophthalmology, Chungbuk National University Hospital, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea d Department of Ophthalmology, University of Dankook, Dankook University Hospital, Dankook, Republic of Korea
3. Department of Ophthalmology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
4. Department of Ophthalmology, Konyang University College of Medicine, Daejeon, Republic of Korea
5. Department of Ophthalmology and Visual Science, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea