Javier P. Gisbert1, D Boixeda1, Carlos Martín de Argila1, Fernando Alvarruiz Bermejo1, Clara Redondo2, Luis Rafael3
1Gastroenterology.
2Pathology, and
3Microbiology, ‘Ramón y Cajal’ Hospital, Department of Medicine, ‘Alcalá de Henares’ University, Madrid, Spain.