1. Territorial Gastroenterology Service, ASL BAT, Andria (BT)
2. Department of Medical and Surgical Sciences, School of Medicine, Catholic University, Rome
3. Territorial Gastroenterology Service, ASL FG, Foggia
4. Territorial Digestive Endoscopy Service, Gioia del Colle Territorial Hospital, ASL BA, Gioia del Colle (BA)
5. Territorial Digestive Endoscopy Service, Mesagne Territorial Hospital, ASL BR, Mesagne (BR)
6. Sanitary District No. 13, Gioia del Colle (BA)
7. Sanitary District No. 4, Barletta (BT)
8. Division of Gastroenterology, ‘S. Camillo’ Hospital, Rome
9. Center for Diagnosis and Treatment of Digestive Diseases, CEMAD, Fondazione Policlinico Universitario ‘A. Gemelli’, IRCCS, Rome, Italy