UW Study Finds Football Helmet Type, Brand Doesn't Lower Risk Of Concussion
NFL, NFLPA approve new helmet that quarterbacks can wear to reduce concussions
NFL players don Guardian Caps, designed to protect from concussion
Finally: First QB Helmet Designed To Reduce Concussions Has Been Approved by NFL
Modern football helmets no better than 'leatherheads' at protecting against concussions, study finds
The link between head injuries and CTE in football, explained - Vox
The Coat of Arms Added Protection or False Security: Football Tests New Guardian Caps to Prevent Concussions
How a game-changing helmet design could prevent concussions - WINK News
NFL hopes to reduce head injuries with helmet experiment
Do helmets protect against concussion? - Queensland Brain Institute - University of Queensland
Riddell launches Axiom, latest helmet to combat concussions