1. From the F. I. Proctor Foundation and the 2Department of Ophthalmology, University of California, San Francisco, California;
2. the Department of Ophthalmology, Chiang Mai University, Chiang Mai, Thailand;
3. the Department of Ophthalmology, Nakornping Hospital, Chiang Mai, Thailand; and
4. From the F. I. Proctor Foundation and
5. the Department of Ophthalmology and Pacific Vision Foundation, California Pacific Medical Center, San Francisco, California.