[1] Santissima Trin Hosp, Dept Surg, Cagliari, Italy
[2] Univ Rovira i Virgili, Tarragona, Spain
[3] Univ Cagliari, Dept Surg Sci, Cagliari, Italy
[4] Univ Sassari, Dept Architecture Design & Urban Planning, Sassari, Italy
[5] Univ Sassari, Dept Med Surg & Expt Sci, Sassari, Italy
[6] Fdn Policlin Univ A Gemelli IRCCS, Emergency Surg & Trauma, Rome, Italy
[7] Osped San Matteo Infermi, Spoleto, Italy
[8] Univ Rovira i Virgili, Nursing Dept, Tarragona 43002, Spain
[9] PO Santissima Trinita, Dept Surg, Via Is Mirrionis 92, I-09121 Cagliari, CA, Italy