1. Department of Medicine (F.H., S.S., P.L., B.A.), Endocrine and Diabetes Unit, University of Würzburg, 97080 Würzburg, Germany;
2. Department of Pharmacology (C.M.-G.), University of Heidelberg, 69120 Heidelberg, Germany;
3. Division of Medical Sciences (P.M.S., W.A.), Institute of Biomedical Research, University of Birmingham, Birmingham B15 2TT, United Kingdom