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APA Citation
Hayes, C., Kearney, M., Collins, C., O'Carroll, H., Wyse, E., Geary, M., & Kelleher, C. (n.d.). oP56 Differential Effects of Smoking Cessation During Pregnancy on Birth Weight in a Cohort of Disadvantaged Women. Journal of epidemiology and community health, 66, A22. http://access.bl.uk/ark:/81055/vdc_100137791644.0x00002d