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APA Citation
Nakamura, M., Murino, A., Despott, E., Suzuki, N., Bourikas, L., Man, R., & Fraser, C. (n.d.). pTU-228 Predicting difficult colonoscopy using the St Mark's difficult colonoscopy scoring system: a pilot study. Gut, 61, A278–A279. http://access.bl.uk/ark:/81055/vdc_100137783303.0x000041