1. Department of Surgery & Medico-Surgical Specialties, General & Oncologic Surgery Unit, Vittorio-Emanuele University Hospital of Catania, University of Catania, Via Plebiscito 628, 95122, Catania, Italy
2. Semmelweiss University of Budapest, Asklepios Campus Hamburg, Hamburg, Germany
3. Department of General & Abdominal Surgery, Asklepios Barmbek Hospital, Hamburg, Germany