Cite
APA Citation
Tennant, P., Textor, J., Gilthorpe, M., & Ellison, G. (n.d.). oP87 Dagitty and directed acyclic graphs in observational research: a critical review. Journal of epidemiology and community health, 71, A43. http://access.bl.uk/ark:/81055/vdc_100135164493.0x000022