False-negative results of Haemoccult test in colorectal cancerBr Med J (Clin Res Ed) 1981; 283 doi: http://dx.doi.org/10.1136/bmj.283.6299.1124 (Published 24 October 1981) Cite this as: Br Med J (Clin Res Ed) 1981;283:1124
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