title: A Comment on the Letter.
authors.affiliation: Department of Medical Sciences, Lab. of Gastroenterology, University of Turin, Turin, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Rosso
authors.affiliation: Department of Medical Sciences, Lab. of Gastroenterology, University of Turin, Turin, Italy.
authors.forename: Gian Paolo
authors.initials: GP
authors.lastname: Caviglia