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APA Citation
Ogilvie, D., Foster, C. E., Rothnie, H., Cavill, N., Hamilton, V., Fitzsimons, C. F., & Mutrie, N. (2007). interventions to promote walking: systematic review. BMJ, 334(7605), 1204–. http://access.bl.uk/ark:/81055/vdc_100151250894.0x000033