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International Journal of Behavioral Nutrition and Physical Activity
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Seasonal variation in objectively assessed physical activity among children and adolescents in Norway: a cross-sectional study

Elin Kolle*, Jostein Steene-Johannessen, Lars B Andersen and Sigmund A Anderssen

International Journal of Behavioral Nutrition and Physical Activity 2009, 6:36 doi:10.1186/1479-5868-6-36

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