1. Department of Nephrology; Charité Universitätsmedizin Berlin; Berlin Germany
2. Department of General, Visceral and Transplantation Surgery; Hannover Medical School; Hannover Germany
3. Department of Nephrology; University Hospital Heidelberg; Heidelberg Germany
4. Department of Transplantation; Division of Internal Medicine and Nephrology; Charité Universitätsmedizin Berlin; Berlin Germany
5. Department of Nephrology; Medical Clinic Köln-Merheim; Cologne Germany
6. Department of Nephrology and Hypertension; University of Bern; Inselspital Bern Switzerland
7. Division of Nephrology; University Hospital; Zurich Switzerland
8. Division of Nephrology and Immunology; University Hospital RWTH Aachen; Aachen Germany
9. Department of Medicine; Division of Nephrology; University of Erlangen; Erlangen Germany
10. Novartis Pharma GmbH; Nuremberg Germany
11. Department of Nephrology; University Hospital Essen; University of Duisburg-Essen; Essen Germany