1. Department of Ophthalmology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
2. Department of Occupational and Environmental Medicine, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea.
3. Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
4. Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
5. Department of Ophthalmology, Ewha Womans University Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Korea.
6. Department of Ophthalmology, Soonchunhyang University Seoul Hospital, Seoul, Korea.
7. Department of Ophthalmology, Kim's Eye Hospital, Konyang University College of Medicine, Seoul, Korea.