1. From the Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, Korea; the2Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea; the
2. Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea; the
3. Department of Ophthalmology, Hanyang University College of Medicine, Guri Hospital, Guri, Korea; and the
4. Department of Applied Statistics, Yonsei University, Seoul, Korea