1. Department of Medicine; Anesthesia and Intensive Care Unit, Padua University Hospital; Padua Italy
2. Department of Surgery; Oulu University Hospital; Oulu Finland
3. Institute of Anatomy, First Faculty of Medicine, Charles University in Prague; Prague Czech Republic
4. Department of Cardiovascular Sciences; University of Leicester, Glenfield Hospital; Leicester UK
5. Division of Cardiac Surgery; University of Verona Medical School; Verona Italy