1. Department of Anaesthesiology, Intensive Care and Pain Management University Medical Centre Maribor Maribor Slovenia
2. Faculty of Medicine University of Maribor Maribor Slovenia
3. Department of Anaesthesiology and Pain Medicine, Inselspital Bern University Hospital Bern Switzerland
4. Department of Anesthesia and Intensive Care AOU Policlinico Vittorio Emanuele Catania Italy
5. Department of Anesthesiology, Critical Care and Pain Medicine University of Texas MD Anderson Cancer Center Houston TX USA