1. Division of Endocrinology/Diabetes (M.J.H., A.K., C.M., C.A.S.), Philadelphia, Pennsylvania, 19104
2. General Clinical Research Center (P.B.), The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, 19104
3. Department of Genetics (A.G.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104
4. Division of Endocrinology (P.S.T.), Cook Children’s Medical Center, Fort Worth, Texas 76104