| Affiliation: | 1.Department of Pediatrics,University Hospital of North Norway and Institute of Community Medicine, University of Troms?,Troms?,Norway;2.Department of Pediatrics,University Hospital of North Norway,Troms?,Norway;3.Institute of Community Medicine, University of Troms?,Troms?,Norway;4.Department of Women's and Children's Health,Uppsala University Children's Hospital,Uppsala,Sweden;5.Department of Laboratory Medicine, Children's and Women's Health,Norwegian University of Science and Technology and Department of Pediatrics, St. Olavs Hospital,Trondheim,Norway |
