1. Department of Nephrology; Universitair Ziekenhuis Brussel; Brussels Belgium
2. Department of Nephrology; Universitair Ziekenhuis Antwerpen; Antwerpen Belgium
3. Department of Nephrology; Centre Hospitalier Universitaire Liège; Liège Belgium
4. Department of Nephrology; Charité Universitätsmedizin Berlin; Berlin Germany
5. Department of Nephrology; Westpfalz Klinikum Kaiserslautern Kaiserslautern Germany
6. Department of Infectious Diseases; University Hospital Essen; University Duisburg-Essen; Essen Germany
7. Department of Nephrology; Centre Universitaire de Bruxelles - Hôpital Erasme; Brussels Belgium
8. Department of Nephrology; Centre Hospitalier Universitaire Brugmann; Brussels Belgium
9. Department of Nephrology and Renal Transplantation; University Hospitals Leuven; Leuven Belgium