1. Division of Endocrinology (O.T.H., C.M., S.B., C.A.S.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283
2. The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania 19104; and the Department of Radiology (M.H.-P., J.R.S., J.S.S., R.F., C.D., A.A.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283
3. Departments of Pathology and Laboratory Medicine (L.M.E.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283
4. Departments of Radiology (H.Z.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283
5. Departments of Surgery (N.S.A.), University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283