1. Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
2. Department of Ophthalmology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 111, Taiwan
3. School of Medicine, Fu-Jen Catholic University, Hsinchuang, 242, Taiwan
4. School of Medicine, Taipei Medical University, Taipei 110, Taiwan
5. Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
6. School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei 110, Taiwan