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APA Citation
Ogilvie, D., Egan, M., Hamilton, V., & Petticrew, M. (2005). systematic reviews of health effects of social interventions: 2. Best available evidence: how low should you go?. Journal of epidemiology and community health, 59(10), 886–892. http://access.bl.uk/ark:/81055/vdc_100137784086.0x000030