1. Department of Anaesthesiology and Intensive Therapy, Faculty of Medicine, University of Szeged, 6 Semmelweis St., Szeged 6725, Hungary
2. 4th Department of Internal Medicine, Attikon University Hospital, 1 Rimini Str., 12462 Athens, Greece
3. Sections of Critical Care Medicine and Infectious Diseases, Medical Microbiology and Pharmacology, University of Manitoba, Winnipeg, MB, Canada
4. Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, 20151 Hamburg, Germany