1. Department of Medicine Huddinge Karolinska Institutet Stockholm Sweden
2. Department of Gastroenterology and Hepatology Department of Health, Medicine and Caring Sciences Linköping University Linköping Sweden
3. Division of Biostatistics Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
4. Division of Hepatology Department of Upper GI Karolinska University Hospital Stockholm Sweden
5. Clinical Epidemiology Unit Department of Medicine Karolinska Institutet Stockholm Sweden