1. Department of Intensive Care Medicine, University of Leuven, Leuven - Belgium
2. Department of Cardiothoracic Anesthesia and Intensive Care, Vita-Salute San Raffaele University, Milan - Italy
3. Department of Anesthesiology and Intensive Care, University of Rome, La Sapienza, Rome - Italy.
4. Division of Cardiology, The Mayo Clinic, Rochester, Minnesota - USA
5. Department of Nephrology, Dialysis and Transplantation, St. Bortolo Hospital - International Renal Research Institute Vicenza (IRRIV), Vicenza - Italy
6. Department of Critical Care Medicine. University of Pittsburgh, Pittsburgh, Pennsylvania - USA