1. Department of Clinical and Experimental Medicine, Gastroenterology Section, “Gaspare Rodolico” Policlinico Hospital, University of Catania, 95100 Catania, Italy
2. ReGenera R&D International for Aging Intervention, 20144 Milan, Italy
3. Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02116, USA
4. Specialization School in Digestive System Diseases, University of Palermo, 90133 Palermo, Italy