1. Department of Emergency Medicine, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
2. Department of Respiratory Medicine, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
3. Department of Anaesthesiology, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
4. Institute for Translational Medicine and Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
5. Outcomes Research Consortium, Cleveland, OH 44195, USA
6. Faculty of Nursing, University of Thessaly, 45550 Larissa, Greece