1 Department of Gastroenterology, Ramsay Générale de Santé, Private Hospital Jean Mermoz, Lyon, France; Department of Gastroenterology, Complejo Hospitalario Universitario de Pontevedra, Pontevedra, Spain.
2 Department of Gastroenterology, Ramsay Générale de Santé, Private Hospital Jean Mermoz, Lyon, France.