1. Gastroenterology Unit ‘Riuniti’ Hospital Foggia Italy
2. Gastroenterology and Digestive Endoscopy ‘Generale’ Hospital Perugia Italy
3. Division of Gastroenterology ‘Curto’ Hospital Polla Italy
4. Haematolgy Unit ‘Santo Spirito’ Hospital Rome Italy
5. Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences ‘Sapienza’ University of Rome Rome Italy
6. Gastroenterology and Digestive Endoscopy Unit Ospedale dei Castelli Hospital Rome Italy
7. Division of Gastroenterology and Digestive Endoscopy Humanitas Research Hospital – IRCCS Milan Italy
8. Gastroenterology and Digestive Endoscopy ‘Nuovo Regina Margherita’ Hospital Rome Italy