1. Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China.
2. Department of Ophthalmology, National Yang-Ming University School of Medicine, Taipei, Taiwan, Republic of China.
3. Department of Ophthalmology, Taipei Medical University, Taipei, Taiwan, Republic of China.
4. Department of Ophthalmology, Shuang-Ho Hospital, Taipei, Taiwan, Republic of China.