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Nigg, C.; Hill, J.; Browning, R. C.; Brink, L.; Kutchman, E.; Amato, K.; Schaefer, C. A.; Anwar, M. M.; Zhang, G. (May 2014). Intervention for Physical Activity for Youth (IPLAY): Elementary schoolyard environment and recess intervention effects on children’s physical activity (Unpublished). In: International Society of Behavioral Nutrition and Physical Activity. San Diego, CA.
