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APA Citation
Downing, K., Hinkley, T., Timperio, A., Salmon, J., Carver, A., Cliff, D., Okely, A., & Hesketh, K. (n.d.). 504Patterns of physical activity and sedentary time: Changes and tracking from early childhood. International journal of epidemiology, 50, . http://access.bl.uk/ark:/81055/vdc_100139931462.0x000026