What Are The Collars That NFL Players Are Wearing? Explained
Will This Device Protect Athletes' Brains, or Only Make Them Think It Does? - The New York Times
Redskins Injury Update: Vernon Davis placed in concussion protocol - Hogs Haven
Q-Collar device to help prevent concussion worn at World Cup
Q-collar: Next Big Thing for Concussion Prevention?
What is the anti-concussion Q-Collar worn by players at the Women's World Cup?
Quinn, Rodriguez among players wearing protective collar at Women's World Cup
Hard-to-see experimental device Luke Kuechly wears on field might save his brain
The story behind the experimental collar worn by Luke Kuechly