1 Department of Intensive Care Medicine, University of Ioannina, Ioannina, Greece. Electronic address: gppthan@uoi.gr.
2 Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium.
3 Department of Critical Care, King's College Hospital NHS Foundation Trust, London, United Kingdom; UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Australia.