1. From the Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts;
2. the College of Optometry, Ohio State University, Columbus, Ohio;
3. the Brien Holden Vision Institute, Sydney, New South Wales, Australia;
4. the Singapore National Eye Center, Singapore, Singapore; and
5. the Department of Ophthalmology, Keio University, Tokyo, Japan.