1 Department of Intensive Care, Erasme University Hospital, Université libre de Bruxelles, Route De Lennik 808, 1070, Brussels, Belgium. jlvincent@intensive.org.
2 Division of Renal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
3 Department of Intensive Care Medicine, Nepean Hospital, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia.