1Centre for Digestive Diseases, Division of Hepatology, Karolinska University Hospital, Stockholm, Sweden
2Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden
3Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
4Department of Gastroenterology and Hepatology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
5Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Sweden
6Department of Medicine Huddinge, Karolinska Institutet, Sweden