1. Institute of Molecular Medicine and Genetics (H.Q., W.B.B.), Medical College of Georgia, Augusta, Georgia 30912
2. Department of Pharmacology and Center for Developmental Genetics (M.A.F.), Stony Brook University, Stony Brook, New York 11794
3. Departments of Physiology, Medicine, Orthopaedic Surgery, and Cell Biology and Anatomy (W.B.B.), Medical College of Georgia, Augusta, Georgia 30912
4. Charlie Norwood Veterans Affairs Medical Center (W.B.B.), Augusta, Georgia 30904