title: Response to Gracie and Ford.
authors.affiliation: Gastroenterology Unit, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain.
authors.forename: Ignacio
authors.initials: I
authors.lastname: Marín-Jiménez
authors.affiliation: Department of Gastroenterology, Hospital Clínic de Barcelona, IDIBAPS, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain.
authors.forename: Julián
authors.initials: J
authors.lastname: Panés