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APA Citation
Graser, A., Stieber, P., Nagel, D., Schäfer, C., Horst, D., Becker, C. R., Nikolaou, K., Lottes, A., Geisbüsch, S., Kramer, H., Wagner, A. C., Diepolder, H., Schirra, J., Roth, H. J., Seidel, D., Göke, B., Reiser, M. F., & Kolligs, F. T. (2009). comparison of CT colonography, colonoscopy, sigmoidoscopy and faecal occult blood tests for the detection of advanced adenoma in an average risk population. Gut, 58(2), 241–248. http://access.bl.uk/ark:/81055/vdc_100137790719.0x00004c