1. Department of Internal Medicine III, Clinical Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
2. Fresenius Medical Care, Research and Development, Bad Homburg, Germany
3. Mannheim Institute of Public Health, Social and Preventive Medicine, University of Heidelberg, Heidelberg, Germany
4. BGStats Consulting, Vienna, Austria
5. Heart of England, NHS Foundation Trust, Birmingham, UK
6. Fresenius Medical Care, Region EMEALA, Bad Homburg, Germany
7. NephroCare Tassin-Charcot, Lyon, France
8. F-CRIN INI-CRT (Cardiovascular and Renal Clinical Trialists), Nancy, France
9. Fresenius Medical Care North America, Waltham, MA, USA
10. Arbor Research Collaborative for Health, Ann Arbor, MI, USA
11. National Research Council of Italy (CNR-IFC), Clinical Epidemiology and Pathophysiology of Renal Diseases and Hypertension, Reggio Calabria, Italy