1. Department of Nephrology and General Medicine (H.P.H.N., M.S., A.W., A.M.), University Medical Center, Albert-Ludwigs-University, D-79106 Freiburg, Germany
2. Divisions of Clinical Chemistry (M.M.H.), University Medical Center, Albert-Ludwigs-University, D-79106 Freiburg, Germany
3. Otolaryngology (C.C.B.), University Medical Center, Albert-Ludwigs-University, D-79106 Freiburg, Germany
4. Hematology and Oncology (H.B.), University Medical Center, Albert-Ludwigs-University, D-79106 Freiburg, Germany
5. Department of Visceral Surgery (M.K.W.), Kliniken Essen Mitte, D-45276 Essen, Germany
6. Departments of Endocrinology (L.C.M.), University of Duisburg-Essen, D-45141 Essen, Germany
7. Pathology (K.W.S.), University of Duisburg-Essen, D-45141 Essen, Germany
8. Genomic Medicine Institute (C.E.), Lerner Research Institute and Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio 44195