1. Department of Surgery (Chief Dr. Claudio Mascetti), “P. Colombo” Hospital, Velletri, Rome, Italy;
2. Department of Anesthesiology and Intensive Care (Chief Dr. Maurizio Capogrossi), “P. Colombo” Hospital, Velletri, Rome, Italy;
3. Department of Surgery, Sapienza University of Rome, Polo Pontino, Terracina, Latina, Italy