1. Department of General and Emergency Surgery, Azienda Ospedaliero-Universitaria Modena, Modena, Italy.
2. General Surgery Department, Torvergata University, Rome, Italy.
3. Azienda Ospedaliero-Universitaria di Modena, Modena, Italy.
4. Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy.