1. Inflammatory Bowel Disease Unit, Department of Gastroenterology Hospital Clínico San Carlos and Instituto de Investigación del Hospital Clínico San Carlos [IdISSC] Madrid Spain
2. Instituto de Investigación del Hospital Clínico San Carlos [IdISSC] Madrid Spain
3. Department of Pathology Hospital Clínico San Carlos Madrid Spain
4. Department of Gastroenterology Hospital Universitario Puerta de Hierro Madrid Spain
5. Department of Gastroenterology Hospital Universitario 12 de Octubre Madrid Spain
6. Department of Gastroenterology Hospital Universitario Fuenlabrada Madrid Spain
7. Department of Gastroenterology Hospital Universitario Fundación Alcorcón Madrid Spain
8. Department of Gastroenterology Hospital Universitario La Fe Valencia Spain
9. Department of Gastroenterology Hospital Universitario Ramón y Cajal Madrid Spain
10. Department of Gastroenterology, Hospital Clínico Universitario de Valencia Valencia Spain