1. Department of Anesthesiology and Postoperative Intensive Care, University Hospital of Ioannina, Ioannina, Greece
2. Department of Anesthesiology and Postoperative Intensive Care, Faculty of Medicine University of Ioannina, Ioannina, Greece
3. Department of Anesthesiology, CH Sud Seine et Marne, Fontainebleau 77310, France
4. Department of Cardiothoracic Surgery, University Hospital of Ioannina, Ioannina, Greece