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APA Citation
Hakeem, A., Marangoni, G., Chapman, S., Young, R., Nair, A., Hidalgo, E., Toogood, G., Lodge, J. P. A., & Prasad, K. R. (n.d.). pTU-136 Does total number and positive lymph node ratio have an impact on outcome following surgical resection for hilar cholangiocarcinoma?. Gut, 61, A241. http://access.bl.uk/ark:/81055/vdc_100137791520.0x000045