1. Pancreato-biliary Endoscopy and Endoscopic Ultrasound, Pancreas Translational and Clinical Research Center, San Raffaele Scientific Institute IRCCS, Milan, Italy
2. Digestive and Liver Disease Unit, S Andrea Hospital, Rome, Italy
3. Pancreatic Surgery Division, Pancreas Translational and Clinical Research Center, San Raffaele Scientific Institute IRCCS, Milan, Italy
4. Università Vita-Salute, Milan, Italy
5. Department of Biology, University of Pisa, Pisa, Italy