1. Departments of Public Health and Clinical Medicine, Epidemiology and Global Health,
2. Medical Biosciences, Medical and Clinical Genetics, and
3. Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden;
4. Department of Clinical Sciences, Pediatrics, Lund University, Lund, Sweden;
5. Department of Clinical and Experimental Medicine, Pediatrics, Linköping University, Linköping, Sweden;
6. Department of Medicine, Clinical Epidemiology Unit, Karolinska Institutet, Stockholm, Sweden; and
7. Sachs’ Children and Youth Hospital, Pediatric Gastroenterology and Nutrition, Stockholm, Sweden