1. Surbrunns Primary Health Care Center, Surbrunnsgatan 66, 11327 Stockholm, Sweden
2. Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Nobels väg 9, 17165 Stockholm, Sweden
3. Department of Gastroenterology, Akademiska University Hospital, 75185 Uppsala, Sweden
4. Astrid Lindgren Children’s Hospital, Karolinska University Hospital, 17176 Stockholm, Sweden
5. Medical Unit Clinical Nutrition, Theme Women’s Health and Allied Health Professionals, Karolinska University Hospital, 17176 Stockholm, Sweden
6. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12, 17177 Stockholm, Sweden
7. Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Region Stockholm, Norra Stationsgatan 69, 11364 Stockholm, Sweden
8. Division of Paediatrics, Department of Clinical Science, Intervention and Technology Karolinska Institutet, Novum, Blickagången 6 A, 14157 Huddinge, Sweden