1. Gastroenterology Unit, Massachusetts General Hospital, Boston, MA, USA
2. Clinical and Translational Epidemiology Unit, Massachusetts General Hospital, Boston, MA, USA
3. Harvard Medical School, Boston, MA, USA
4. Pediatric Gastroenterology and Nutrition Unit, Sachs’ Children’s Hospital, Stockholm, Sweden
5. Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
6. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
7. Department of Pediatrics, Örebro University Hospital, Örebro University, Örebro, Sweden
8. Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
9. Karolinska Clinical Epidemiology Unit, Karolinska Institutet, Solna, Sweden