Medical research out of Canada that undercuts claims of the effectiveness of colonoscopies at preventing cancer had all three anchors scrambling. The research tripled the estimate of overlooked tumors, from failing to find 10% of fatal cases to between 30% and 40% of them. "Does this news mean I do not need to get my colonoscopy?" asked NBC's Robert Bazell rhetorically. "A lot of doctors I talked to said the answer to that is absolutely not." Anchor Brian Williams concurred: "That is a great danger of stories out there like this one." At CBS, anchor Katie Couric, the nation's leading publicist for the necessity of colon screening, insisted: "Do not use this study as an excuse not to get screened." "Absolutely," her in-house physician Jon LaPook agreed. On ABC anchor Charles Gibson drummed the point home: "Experts stress it is still crucial to get colonoscopies." His in-house physician Timothy Johnson (embargoed link) implied that some of those Canadians may not have prepared properly for their screening: "Cooperate with the instructions for cleaning out," he lectured.
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