1 Intensive Care Medicine, Intensive Care Unit, Faculty of Medicine, General University Hospital of Larissa, University of Thessaly, Mezourlo, 41110, Larissa, Greece. vasotsolaki@yahoo.com.
2 Intensive Care Unit, General Hospital of Athens "KAT", Athens, Greece.
3 Intensive Care Medicine, Intensive Care Unit, Faculty of Medicine, General University Hospital of Larissa, University of Thessaly, Mezourlo, 41110, Larissa, Greece.