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

Carl K Lachat, Roosmarijn Verstraeten, Le Khanh, Maria Hagströmer, Nguyen Khan, Nguyen Van, Nguyen Dung, Patrick W Kolsteren
International Journal of Behavioral Nutrition and Physical Activity 2008, 5:37 (10 July 2008)

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