1. Intensive Care Unit, Ghent University Hospital, Gent - Belgium
2. Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital, International Renal Research Institute Vicenza (IRRIV), Vicenza - Italy
3. UCL Center for Nephrology, Royal Free and University College Medical School, London - UK
4. UCSD Medical Center, San Diego, California - USA
5. Division of Medicine, Fresenius Medical Care, Bad Homburg - Germany