1. Department of Intensive Care Unit, Mont-Godinne University Hospital, CHU UCL Namur, Namur, Belgium
2. Department of Pneumology, Mont-Godinne University Hospital, CHU UCL Namur, Namur, Belgium
3. Department of Critical Care Medicine, Attikon University Hospital, Haidari, Greece
4. Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium