1 Puerta de Hierro University Hospital, IBD Unit, Gastroenterology and Hepatology Department, Calle Manuel de Falla, 1, Madrid, Spain. Electronic address: Marta.hernandez.conde@gmail.com.
2 Puerta de Hierro University Hospital, IBD Unit, Gastroenterology and Hepatology Department, Calle Manuel de Falla, 1, Madrid, Spain.