1. Department of Medicine and Health Sciences; Faculty of Health Sciences; Linköping University; Linköping Sweden
2. Department of Social and Welfare Studies; Faculty of Health Sciences; Linköping University; Norrköping Sweden
3. Division of Pediatrics; Department of Clinical and Experimental Medicine; Faculty of Health Sciences; Linköping University; Linköping Sweden
4. Department of Pediatrics; County Council of Östergötland; Linköping Sweden