1. Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892
2. Office of the Clinical Director, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892
3. Cellular and Molecular Therapeutics Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, 20892
4. Sickle Cell Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, 20892
5. Department of Medicinal Chemistry, Calibr at Scripps Research, La Jolla, CA 92037