1. Department of Emergency and Reparative Medicine, Karolinska University Hospital, Stockholm, Sweden;
2. Department of Gastroenterology, Karolinska University Hospital, Stockholm, Sweden;
3. Department of Medicine, Division of Gastroenterology and Hepatology, Danderyds Hospital, Stockholm, Sweden;
4. Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden;
5. Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden;
6. Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden