1 Department of Ophthalmology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan 701, Taiwan.
2 Department of Ophthalmology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan 701, Taiwan. hungjh@mail.ncku.edu.tw.
3 Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan. hungjh@mail.ncku.edu.tw.