1. Division of Endocrinology and Metabolism (A.J.v.d.L.), Department of Internal Medicine, Erasmus Medical Center, 3015 GD Rotterdam, The Netherlands;
2. Department of Psychiatry (M.T.), University of Cincinnati, Cincinnati, Ohio 45237;
3. Endocrine Research Department (M.L.H.), Eli Lilly and Co., Indianapolis, Indiana 46285;
4. Division of Endocrinology (E.G.), Department of Internal Medicine, University of Turin, Turin, Italy 10095