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APA Citation
Ogilvie, D., Hamilton, V., Egan, M., & Petticrew, M. (2005). systematic reviews of health effects of social interventions: 1. Finding the evidence: how far should you go?. Journal of epidemiology and community health, 59(9), 804–808. http://access.bl.uk/ark:/81055/vdc_100135545595.0x00001f