1. Department of Nuclear Medicine, University of Würzburg, Germany.
2. Institute for Statistics and Econometrics, University of Hamburg, Germany.
3. Department of Nuclear Medicine, University of Cologne, Germany.
4. Medical Department, Sanofi-Synthelabo GmbH, Division Henning, Berlin, Germany.
5. Department of Occupational Medicine, Medical School Hannover, Germany.
6. Department of Internal Medicine/Endocrinology, Academic Teaching Hospital Bogenhausen, Munich, Germany.