University of Iowa researchers to compare tackle to flag football

Friday's health and safety news from the world of football:

  • Omaha World Herald quoted a University of Nebraska concussion researcher who says we have only touched the tip of the iceberg on head injuries.
  • An Arizona State student and former EMT has invented a new concussion-diagnosing tool that is connected to the mouthguard, it was announced Thursday.

-- Bill Bradley, contributing editor

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