1 Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden; Division of Hepatology, Department of Upper GI Diseases, Karolinska University Hospital, Stockholm, Sweden. Electronic address: hannes.hagstrom@ki.se.
2 Department of Medical Sciences, Gastroenterology Research Group, Uppsala University, Uppsala, Sweden.
3 Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden.
4 Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden.