1. Program in Nutritional Metabolism and Neuroendocrine Unit (H.M., T.L.S., N.S., S.K.G.) Massachusetts General Hospital, Boston, Massachusetts 02114;
2. Pediatric Endocrine Unit (T.L.S.), Massachusetts General Hospital, Boston, Massachusetts 02114;
3. Massachusetts General Hospital and Harvard Medical School, and the Pulmonary and Critical Care Medicine Unit (M.I.H., D.M.S.), Massachusetts General Hospital, Boston, Massachusetts 02114;
4. Mirtech (M.I.H.), Inc., Brockton, Massachusetts 02301