1. Department of Endocrinology and Metabolism (T.S., H.L.), Otto von Guericke University Medical School, D-39120 Magdeburg, Germany
2. National Institutes of Health (G.E., K.P.), Bethesda, Maryland 20892
3. Department of General, Visceral, and Vascular Surgery (H.D.), Martin Luther University, D-06099 Halle/Saale, Germany
4. Warwick Medical School (H.L.), University Hospital of Coventry, Coventry CV4 7AL, United Kingdom