A European study recently published in the New England Journal of Medicine has been raising questions about the effectiveness of colonoscopies in preventing colon cancer. 

KCBS Radio's Melissa Culross discussed with Dr. Alan Venook, Professor of Medicine at UCSF and Associate Director at the UCSF Helen Diller Family Comprehensive Cancer Center on "As Prescribed.

<p>A European study recently published in the New England Journal of Medicine has been raising questions about the effectiveness of colonoscopies in preventing colon cancer. </p>
<p>KCBS Radio's Melissa Culross discussed with Dr. Alan Venook, Professor of Medicine at UCSF and Associate Director at the UCSF Helen Diller Family Comprehensive Cancer Center on "As Prescribed.</p>

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