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APA Citation
Lee, T. Y., Cheon, Y. K., Shim, C. S., Choi, H. J., Moon, J. H., Choi, J. S., & Oh, H. (n.d.). endoscopic wire‐guided papillectomy versus conventional papillectomy for ampullary tumors: A prospective comparative pilot study. Journal of gastroenterology and hepatology, 31(4), 897–902. http://access.bl.uk/ark:/81055/vdc_100031988936.0x000044