1 Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea; Department of Ophthalmology, Konyang University College of Medicine, Daejeon, Republic of Korea.
2 Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
3 Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea. Electronic address: kimjy@cnu.ac.kr.