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Marit Saunes*, Torbjørn Øien, Christian K Dotterud, Pål R Romundstad, Ola Storrø, Turid L Holmen and Roar Johnsen
* Corresponding author: Marit Saunes marit.saunes@ntnu.no
BMC Pediatrics 2012, 12:168 doi:10.1186/1471-2431-12-168