Assertion: colonoscopy | /r/CapableOf | examine longer section of the colon
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Source sentences:
text: A 2003 analysis of the relative risks of sigmoidoscopy and colonoscopy brought into attention that the risk of perforation after colonoscopy is approximately double that after sigmoidoscopy (consistent with the fact that colonoscopy examines a longer section of the colon), a difference that appeared to be decreasing.