1. Department of Pediatrics (M.S.K., M.E.G., V.G.), Los Angeles, California 90027
2. Division of Endocrinology (M.S.K., M.E.G.), Los Angeles, California 90027
3. Children's Hospital Los Angeles; and The Saban Research Institute (M.S.K., H.H.H., M.E.G., V.G.), Los Angeles, California 90027
4. Department of Radiology (H.H.H., P.C.A., V.G.), Los Angeles, California 90027