1. Department of Internal Medicine I (S.B., J.Wa., S.S., J.We., M.N., C.D., C.H., N.Z., A.S., C.B.), Regensburg University Hospital, D-93042 Regensburg, Germany
2. Institute of Clinical Chemistry and Laboratory Medicine (C.A.), Regensburg University Hospital, D-93042 Regensburg, Germany