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APA Citation
Bevan, R., Blanks, R. G., Nickerson, C., Saunders, B. P., Stebbing, J., Tighe, R., Veitch, A. M., Garrett, W., & Rees, C. J. (2019). factors affecting adenoma detection rate in a national flexible sigmoidoscopy screening programme: a retrospective analysis. Lancet gastroenterology and hepatology, 4, 239–247. http://access.bl.uk/ark:/81055/vdc_100077461056.0x000001