Trevor Schaefer, youth ambassador and founder of Trevor's Trek Foundation, testifies during a hearing on "Disease Clusters and Environmental Health."
Trevor Schaefer, youth ambassador and founder of Trevor's Trek Foundation, testifies during a hearing on "Disease Clusters and Environmental Health." Pete Marovich/MCT
Trevor Schaefer, youth ambassador and founder of Trevor's Trek Foundation, testifies during a hearing on "Disease Clusters and Environmental Health." Pete Marovich/MCT

Congress urged to track cancer clusters better

March 29, 2011 04:27 PM

UPDATED March 29, 2011 05:30 PM

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