1. Department of Education, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
2. School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
3. Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
4. College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
5. Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
6. Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
7. Department of Ophthalmology, Edward S. Harkness Eye Institute, Columbia University Irving Medical Center, Columbia University, 622 W 168th St, New York, NY 10032, USA
8. Department of Ophthalmology, Tucheng Municipal Hospital, New Taipei 236, Taiwan
9. Department of Ophthalmology, Jen-Ai Hospital Dali Branch, Taichung 412, Taiwan
10. Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung Branch, Keelung 204, Taiwan