1. Department of Ophthalmology, Kim's Eye Hospital, Myung-Gok Eye Research Institute, Seoul, Korea.
2. Department of Ophthalmology, Kyungpook National University School of Medicine, Daegu, Korea.
3. Department of Ophthalmology, Konyang University College of Medicine, Daejon, Korea.
4. Lee's Eye Clinic, Seoul, Korea.
5. Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.