1. Department of Epidemiology Harvard T.H. Chan School of Public Health Boston Massachusetts USA
2. Department of Clinical Science and Education Södersjukhuset Karolinska Institute Stockholm Sweden
3. Clinical Epidemiology Division, Department of Medicine Solna, Karolinska Institute Stockholm Sweden
4. Sachs' Children and Youth Hospital Stockholm South General Hospital Stockholm Sweden
5. Department of General Medicine Institute of Health and Society, University of Oslo Oslo Norway
6. Vårdcentralen Nysäter and Center for Clinical Research County Council of Värmland Värmland Sweden
7. Department of Medical Epidemiology and Biostatistics Karolinska Institute Stockholm Sweden
8. Faculty of Medicine and Health Örebro University Örebro Sweden
9. Clinical and Translational Epidemiology Unit Massachusetts General Hospital Boston Massachusetts USA
10. Division of Gastroenterology Massachusetts General Hospital and Harvard Medical School Boston Massachusetts USA
11. Institute of Environmental Medicine Nutrition Epidemiology, Karolinska Institutet Solna Sweden
12. Department of Gastroenterology Faculty of Medicine and Health, Örebro University Örebro Sweden
13. Department of Nutrition Harvard T. H. Chan School of Public Health Boston Massachusetts USA
14. Department of Pediatrics Örebro University Hospital Örebro Sweden
15. Division of Digestive and Liver Disease, Department of Medicine Columbia University Medical Center New York New York USA