Affiliations

• ¹ Department of Paediatric and Adolescent Medicine, Akershus University Hospital, Postboks 1000, 1478, Lørenskog, Norway; Norwegian Institute of Public Health, PO BOX 222 Skøyen, 0213, Oslo, Norway; Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. Electronic address: l.b.havdal@medisin.uio.no.
• ² Norwegian Institute of Public Health, PO BOX 222 Skøyen, 0213, Oslo, Norway.
• ³ Norwegian Institute of Public Health, PO BOX 222 Skøyen, 0213, Oslo, Norway; Department of Microbiology, Oslo University Hospital, Ullevål, Postboks 4950 Nydalen, 0424, Oslo, Norway.
• ⁴ Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Ullevål, Postboks, 4950 Nydalen, 0424, Oslo, Norway.
• ⁵ Department of Paediatrics, Østfold Hospital, Kalnes, Postboks 300, 1714, Grålum, Norway; Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
• ⁶ Department of Medical Microbiology, Østfold Hospital, Kalnes, Postboks 300, 1714, Grålum, Norway.
• ⁷ Department of Paediatrics, St. Olavs University Hospital, Postboks 3250 Torgarden, 7006, Trondheim, Norway; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Norway.
• ⁸ Department of Medical Microbiology, St. Olavs University Hospital, Postboks 3250 Torgarden, 7006, Trondheim, Norway; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Norway.
• ⁹ Department of Paediatric and adolescent Medicine, Stavanger University Hospital, Postboks 8100, 4068, Stavanger, Norway.
• ¹⁰ Department of Medical Microbiology, Stavanger University Hospital, Postboks 8100, 4068, Stavanger, Norway.
• ¹¹ Department of Paediatric and Adolescent Medicine, Akershus University Hospital, Postboks 1000, 1478, Lørenskog, Norway; Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
• ¹² Department of Paediatric and Adolescent Medicine, Akershus University Hospital, Postboks 1000, 1478, Lørenskog, Norway.