1. Department of Ophthalmology, Chungbuk National University Hospital, College of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
2. Department of Ophthalmology, College of Medicine, Chungbuk National University, Daejeon 35015, Republic of Korea
3. 1.0 Eye Clinic, Daejeon 34946, Republic of Korea