1 Armonia Private Clinic, Porto Mantovano (MN) Italy. francoferrarini.ff@gmail.com.
2 Division of Gastroenterology B, AOUI Verona, Verona, Italy, Division of Gastroenterology and Hepatology and Center for Functional GI and Motility Disorders, University of North Carolina at Chapel Hill, Chapel Hill NC, USA.
3 ASP 9 Trapani, Trapani, Italy.
4 Division of Gastroenterology and Digestive Endoscopy, Academic Hospital Cattinara, Trieste, Italy.