1 Evangelia Samara, MD, PhD, Agathi Karakosta, MD, PhD, Petros Tzimas, MD, PhD, Department of Anesthesiology and Postoperative Intensive Care, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece.
2 Vasilios Tsionaras, MD, Department of Anesthesiology and Postoperative Intensive Care, University Hospital of Ioannina, Ioannina, Greece.