1. Department of Pediatrics (C.J.K., N.H., W.L.M.), University of California, San Francisco, California 94143
2. UCL Institute of Child Health (L.L., J.C.A.), University College London, London WC1N 1EH, United Kingdom
3. Lilly Research Laboratories (C.A.Q.), US Medical, Indianapolis, Indiana 46285
4. Division of Pediatric Endocrinology and Metabolism (T.W.A.), The Brookdale University Hospital and Medical Center, State University of New York, Brooklyn, New York 11212