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APA Citation
Khan, S. A., Davidson, B. R., Goldin, R. D., Heaton, N., Karani, J., Pereira, S. P., Rosenberg, W. M. C., Tait, P., Taylor-Robinson, S. D., Thillainayagam, A. V., Thomas, H. C., & Wasan, H. (2012). guidelines for the diagnosis and treatment of cholangiocarcinoma: an update. Gut, 61(12), 1657–1669. http://access.bl.uk/ark:/81055/vdc_100135137246.0x000041