1. Gastroenterology-Hepatology Unit, Hospital Ramón y Cajal, Madrid, Spain
2. Gastroenterology-Hepatology Unit, Hospital Universitario Puerta de Hierro Majadahonda, Majadahonda, Spain
3. Gastroenterology-Hepatology Unit, Hospital Germans Trias i Pujol, Badalona, Spain
4. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas [CIBERehd], Instituto de Salud Carlos III, Madrid, Spain
5. Digestive Diseases Unit, Hospital Clínico San Carlos, Instituto Investigación Sanitaria San Carlos [IdISSC], Madrid, Spain
6. General Surgery Unit, Hospital Universitario Puerto Real, Puerto Real, Spain
7. Digestive Diseases Unit, Hospital Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón [IiSGM], Madrid, Spain
8. Gastroenterology-Hepatology Unit, Hospital Universitari de Bellvitge-IDIBELL, Barcelona, Spain
9. Digestive Diseases Unit, Hospital Universitario Virgen de Macarena, Sevilla, Spain
10. Gastroenterology-Hepatology Unit, Hospital Universitari Mutua Terrassa, Terrassa, Spain
11. Digestive Diseases Unit, Hospital Reina Sofía, Córdoba, Spain
12. Gastroenterology-Hepatology Unit, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas, Spain
13. Digestive Diseases Unit, Hospital 12 de Octubre, Madrid, Spain
14. Digestive Diseases Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria La Princesa [IIS-IP], Madrid, Spain
15. Digestive Diseases Unit, Hospital Clínic de Valencia, University of Valencia, Valencia, Spain
16. Digestive Diseases Unit, Hospital Arquitecto Marcide, Ferrol, Spain
17. Digestive Diseases Unit, Corporació Sanitària Parc Taulí, Sabadell, Spain
18. Digestive Diseases Unit, Hospital Universitario Río Hortega, Valladolid, Spain
19. Digestive Diseases Unit, Hospital de Manises, Valencia, Spain
20. Digestive Diseases Unit, Hospital Universitario La Paz, Madrid, Spain
21. Gastroenterology-Hepatology Unit, Hospital Del Mar, Barcelona, Spain
22. Digestive Diseases Unit, Hospital Universitario de Fuenlabrada, Fuenlabrada, Spain
23. Radiology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain
24. Digestive Diseases Unit, Hospital Universitario y Politécnico de La Fe, Valencia, Spain