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APA Citation
Attia, J. R., Oldmeadow, C., Holliday, E. G., & Jones, M. P. (2017). deconfounding confounding part 2: using directed acyclic graphs (DAGs). Medical journal of Australia, 206(11), 480–483. http://access.bl.uk/ark:/81055/vdc_100081468605.0x000060