An adapted version of the long International Physical Activity Questionnaire (IPAQ-L): construct validity in a low-income, multiethnic population study from Oslo, Norway

Sidsel Graff-Iversen, Sigmund A Anderssen, Ingar M Holme, Anne Jenum, Truls Raastad
International Journal of Behavioral Nutrition and Physical Activity 2007, 4:13 (20 April 2007)

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