Department of Medical Gastroenterology, Odense University Hospital, Odense, Denmark; Institute of Clinical Research, University of Southern Denmark, SDU, Odense, Denmark; OPEN; Odense Patient Data Explorative Network, Odense University Hospital, Odense, Denmark. Electronic address: sine.obling@rsyd.dk. Department of Internal Medicine, Nykøbing F. Hospital, Nykøbing, Denmark. Electronic address: bvw@regionsjaelland.dk. Department of Medical Oncology, Odense University Hospital, Odense, Denmark. Electronic address: per.pfeiffer@rsyd.dk. Department of Medical Gastroenterology, Odense University Hospital, Odense, Denmark; Institute of Clinical Research, University of Southern Denmark, SDU, Odense, Denmark. Electronic address: Jens.kjeldsen@rsyd.dk.