1. Department of Pediatrics Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
2. Department of Pediatrics Hallands Hospital Halmstad Halmstad Sweden
3. Department of Radiology Institution of Surgical Science, Uppsala University Uppsala Sweden
4. Primary Health Care Unit, Department of Public Health and Community Medicine, Institute of Medicine Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
5. Department of Pediatric Radiology Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
6. Antaros Medical Mölndal Sweden