1. Department of Ophthalmology, Kaohsiung Municipal Siaogang Hospital, Kaohsiung 812, Taiwan
2. Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
3. Department of Ophthalmology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
4. Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 807, Taiwan
5. Center for Cancer Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan
6. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
7. Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung 804, Taiwan
8. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan