1. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
2. Clinical Epidemiology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
3. Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
4. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
5. Division of Surgery, Danderyd Hospital, Stockholm, Sweden
6. Department of Pelvic Cancer, Karolinska University Hospital, Stockholm, Sweden
7. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
8. Department of Pediatrics, Örebro University Hospital, Örebro University, Örebro, Sweden
9. Department of Pediatric Gastroenterology and Nutrition, Sachs’ Children and Youth Hospital, Stockholm, Sweden