Validity of a practitioner-administered observational tool to measure physical activity, nutrition, and screen time in school-age programs

Rebekka M Lee, Karen M Emmons, Cassandra A Okechukwu, Jessica L Barrett, Erica L Kenney, Angie L Cradock, Catherine M Giles, Madeleine E deBlois, Steven L Gortmaker
International Journal of Behavioral Nutrition and Physical Activity 2014, 11:145 (28 November 2014)

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