1. Liver Research Unit; Santa Cristina University Hospital; Instituto de Investigación Sanitaria Princesa; CIBERehd; Madrid Spain
2. Service of Pathology; Santa Cristina University Hospital; Madrid Spain
3. Service of General and Abdominal Surgery; Santa Cristina University Hospital; Madrid Spain
4. Statistics and Methodology Unit; Instituto de Investigación Sanitaria Princesa; Madrid Spain
5. Gastroenterology Unit; Hospital del Tajo; Aranjuez Spain