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APA Citation
Ellis, J., Ellison, G., Textor, J., & Gilthorpe, M. (n.d.). oP70 Any relationship between baseline exposure and baseline outcome will generate a spurious relationship between baseline exposure and change in outcome due to mathematical coupling. Journal of epidemiology and community health, 70, A40. http://access.bl.uk/ark:/81055/vdc_100137791755.0x000026