1 Department of Gastroenterology, Hospital Universitari Mutua Terrassa, Terrassa (Barcelona), Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Terrassa (Barcelona), Spain.
2 Department of Gastroenterology, Hospital Universitari Mutua Terrassa, Terrassa (Barcelona), Spain.
3 UGC of Immunology, San Carlos Institute for Health Research (IdISSC), Madrid, Spain.
4 UGC of Immunology, San Carlos Institute for Health Research (IdISSC), Madrid, Spain. Electronic address: conchita.npardo@gmail.com.