Kolsgaard Magnhild L Pollestad, Joner Geir, Brunborg Cathrine, Anderssen Sigmund A, Tonstad Serena, Andersen Lene Frost
Department of Pediatrics, Oslo University Hospital, Ullevål, PB 4956, Nydalen 0424, Oslo, Norway.
BMC Pediatr. 2012 Jun 18;12:77. doi: 10.1186/1471-2431-12-77.