Affiliation: | 1. Department of Molecular Medicine and Surgery, Karolinska Institutet, , Stockholm, Sweden;2. Division of Coloproctology, Center for Digestive Disease, Karolinska University Hospital, , Stockholm, Sweden;3. Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, , Stockholm, Sweden;4. Department of Environmental Medicine, Karolinska Institutet, , Stockholm, Sweden |