1. Department of Ophthalmology Seoul National University College of Medicine, and Seoul National University Bundang Hospital, Seongnam, Republic of Korea 2Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Ko
2. Cancer Registration and Statistic Branch, Division of Cancer Registration and Surveillance, National Cancer Center, Goyang, Republic of Korea
3. Department of Ophthalmology Seoul National University College of Medicine, and Seoul National University Bundang Hospital, Seongnam, Republic of Korea
4. Cancer Registration and Statistic Branch, Division of Cancer Registration and Surveillance, National Cancer Center, Goyang, Republic of Korea 4Cancer Surveillance Branch, Division of Cancer Registration and Surveillance, National Cancer Center, Goyang, Re