1. Department of Surgery, University of L'Aquila, Italy; Università degli Studi de L'Aquila, Dipartimento Discipline Chirurgiche, Via Vetoio—Blocco 11, Palazzina A, Coppito—67100 L'Aquila, Italy
2. Department of Surgery, University of L'Aquila, Italy
3. Department of Pediatrics, University of L'Aquila, Italy