1 Department of Surgical Science, University of Turin, Turin, Italy.
2 Department of Surgical Science, University of Turin, Turin, Italy. Electronic address: eleonora.balzani@unito.it.
3 Department of Anesthesia, Intensive Care and Emergency, 'Città della Salute e della Scienza' Hospital, Turin, Italy.
4 Department of Surgical Science, University of Turin, Turin, Italy; Department of Anesthesia, Intensive Care and Emergency, 'Città della Salute e della Scienza' Hospital, Turin, Italy.