1. Humanitas Clinical and Research Center—IRCCS, 20089 Milan, Italy
2. Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy
3. Department of Surgery, Oncology and Gastroenterology, University of Padua, 35128 Padua, Italy
4. Gastroenterology, Department of Clinical Medicine and Surgery, University Federico II, 80138 Naples, Italy
5. Clinic of Gastroenterology, Hepatology and Emergency Digestive Endoscopy, University Politecnica delle Marche, 60126 Ancona, Italy