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APA Citation
Kamran, U., Evison, F., Rutter, M., Adderley, N., Brookes, M., Morris, E., Burr, N., Valori, R., McCord, M., & Trudgill, N. (n.d.). o50 Variation in postendoscopy upper gastrointestinal cancer across endoscopy providers in England: a population-based study. Gut, 71, A28–A29. http://access.bl.uk/ark:/81055/vdc_100156720488.0x000023