1. Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna , Vienna , Austria
2. Section for Clinical Biometrics, Center for Medical Statistics, Informatics and Intelligent Systems (CeMSIIS), Medical University of Vienna , Vienna , Austria
3. Department of Pathology, Medical University of Vienna , Vienna , Austria
4. Department of Blood Group Serology and Transfusion Medicine, Medical University of Vienna , Vienna , Austria
5. Institute of Pathology, University Hospital of Cologne , Cologne , Germany
6. Department of Medicine, University , Winnipeg , Canada ; Shared Health Services Manitoba, Canada ; , Winnipeg , Canada
7. of Manitoba , Winnipeg , Canada ; Shared Health Services Manitoba, Canada ; , Winnipeg , Canada
8. Department of Immunology, University of Manitoba , Winnipeg , Canada ; Shared Health Services Manitoba, Canada ; , Winnipeg , Canada