Drug Therapy

From the National Eye Institute, National Institutes of Health, Bethesda, Md. (F.L.F.); the Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison (M.D.D.); and Beetham Eye Institute, Joslin Diabetes Center, Boston (L.M.A.). Address reprint requests to Dr. Ferris at the Division of Biometry and Epidemiology, 31 Center Dr., MSC-2510, Bldg. 31, Rm. 6A52, Bethesda, MD 20892-2510, or at [email protected].