1. Section for Pediatrics, Department of Clinical Medicine, Haugesund Hospital, Fonna Health Trust , Haugesund , Norway
2. Section for Pediatrics, Department of Clinical Medicine , University of Bergen , Bergen , Norway
3. Department of Research and Innovation , Fonna Health Trust , Haugesund , Norway
4. Department of Health Promotion , Norwegian Institute of Public Health , Bergen , Norway
5. Department of Mental Health , Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology , Trondheim , Norway