1. Division of Endocrinology and Diabetology (N.C., M.B., R.W.J., A.M.C.), Faculty of Medicine, University Hospital, CH-1211 Geneva, Switzerland
2. Department of Physiology (Se.A., N.D.), Faculty of Medicine, University Hospital, CH-1211 Geneva, Switzerland
3. Geriatric Research, Education, and Clinical Center (Sa.A.), Veterans Affairs Palo Alto Health Care System, Palo Alto, California 94304