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Validity of two physical activity questionnaires (IPAQ and PAQA) for Vietnamese adolescents in rural and urban areas

Carl K Lachat, Roosmarijn Verstraeten, Le NB Khanh, Maria Hagströmer, Nguyen C Khan, Nguyen DA Van, Nguyen Q Dung and Patrick W Kolsteren*

International Journal of Behavioral Nutrition and Physical Activity 2008, 5:37 doi:10.1186/1479-5868-5-37

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