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APA Citation
Richiardi, L., Barone-Adesi, F., Merletti, F., & Pearce, N. (2008). using directed acyclic graphs to consider adjustment for socioeconomic status in occupational cancer studies. Journal of epidemiology and community health, 62(7), e14. http://access.bl.uk/ark:/81055/vdc_100137790294.0x00002b