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HARVARD Citation
Tennant, P. et al. (n.d.). OP87 Dagitty and directed acyclic graphs in observational research: a critical review. Journal of epidemiology and community health. p. A43. [Online].
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Tennant, P. et al. (n.d.). OP87 Dagitty and directed acyclic graphs in observational research: a critical review. Journal of epidemiology and community health. p. A43. [Online].