1 Departments of Emergency and Surgery, Trauma Surgery Unit, Maggiore Hospital, Bologna Local Health District, Bologna, Italy General and Emergency and Trauma Surgery, I unit, Ospedali Riuniti, Bergamo, Italy Department of Surgery, Hospital of Macerata, Macerata, Italy General and Emergency and Trauma Surgery, I unit, Ospedali Riuniti, Bergamo, Italy Departments of Emergency and Surgery, Trauma Surgery Unit, Maggiore Hospital, Bologna Local Health District, Bologna, Italy.