1. Department of Pediatric Endocrinology (W.W.B., K.L.M.), University of Alabama School of Medicine, Birmingham, Alabama 35233
2. Endocrine Unit and Pediatric Nephrology Unit (H.J.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114
3. Feinberg School of Medicine (C.B.L.), Children’s Memorial Hospital, Chicago, Illinois 60614
4. Northwestern University, Kidney Diseases (H.P.), Children’s Memorial Hospital, Chicago, Illinois 60614;
5. Department of Medical and Molecular Genetics (E.G.F., K.E.W.), Indiana University School of Medicine, Indianapolis, Indiana 46202