1 1Unit of Endocrine, Digestive, and Emergency Surgery, Department of Biomedical Sciences and Human Oncology, University Medical School "Aldo Moro" of Bari, Bari, Italy.
2 2Department of Thoracic Surgery, University of Bari, Bari, Italy.
3 3Unit of Laparoscopic Surgery, Department of Emergency and Organ Transplantation, University Medical School "A. Moro" of Bari, Bari, Italy.