Department of Ophthalmology, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea. Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea. Department of Ophthalmology, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea. Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea. Department of Ophthalmology, Kyungpook National University School of Medicine, Daegu, Korea. Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea. Department of Ophthalmology, Chonnam National University Medical School, Gwangju, Korea. Department of Ophthalmology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea. Department of Ophthalmology, Institute of Vision Research, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea. Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea. Department of Ophthalmology, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea. sara514@catholic.ac.kr.