1. The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Ophthalmology and Visual Science, The Catholic University of Korea School of Medicine, Seoul, Korea.
3. Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Ulsan, Korea.
4. Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
5. BS Eye Center, Seoul, Korea.
6. National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.