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APA Citation
Dave, M., Johnson, L. A., Walk, S. T., Young, V. B., Stidham, R. W., Chaudhary, M. N., FunNell, J., & Higgins, P. D. R. (2011). a randomised trial of sheathed versus standard forceps for obtaining uncontaminated biopsy specimens of microbiota from the terminal ileum. Gut, 60(8), 1043–1049. http://access.bl.uk/ark:/81055/vdc_100137794585.0x000040