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Steffen, Alana D.; Nigg, Claudio R.; Anwar, Mahabub-Ul R.; Kutchman, Eve; Amato, Katie; Schaefer, Christine A.; Browning, Ray; Brink, Lois; Hill, James (2012). Moderating factors of children’s physical activity on playgrounds. Annals of behavioral medicine, 43(Suppl. 1), S203-S203. Springer
