1. From the Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts;
2. the Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts;
3. From the Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts; the Departments of 4Biostatistics and
4. From the Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham & Women's Hospital, Boston, Massachusetts; 5Epidemiology, Harvard School of Public Health, Boston, Massachusetts; and
5. the Center for Human Genetics Research, Vanderbilt University School of Medicine, Nashville, Tennessee.