1. From the Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, P. R. China; 2Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts;
2. Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts; the 4Department of Ophthalmology and Ophthalmic Laboratories, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R. China; and
3. Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts;
4. the Vanderbilt Eye Institute, Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, Tennessee.