1. Departments of Internal Medicine I (J.W., M.N., J.W., S.B., A.Schä., J.S., C.B.), Regensburg University Hospital, D-93042 Regensburg, Germany
2. Surgery (S.F., M.N.S., A.Schn.), Regensburg University Hospital, D-93042 Regensburg, Germany
3. Institute of Clinical Chemistry and Laboratory Medicine (C.A.), Regensburg University Hospital, D-93042 Regensburg, Germany