1. Department of Ophthalmology, Cheng Hsin General Hospital, Taipei, Taiwan, Republic of China.
2. Department of Ophthalmology, Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China.
3. Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China.
4. Department of Medical Research and Education, Cheng Hsin General Hospital, Taipei, Taiwan, Republic of China.
5. Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China.