1 Division of Hepatology, Department of Upper Gastrointestinal Diseases, Karolinska University Hospital, Stockholm, Sweden; Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden.
2 Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden.
3 Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan.