FA Concussion Guidelines - If in doubt, sit them out
England one of only five countries to trial new football concussion protocols | Soccer | The Guardian
NFL makes changes with NEW concussion protocols [Everything you NEED to know] | CBS Sports HQ - YouTube
The NFL and players union agreed to an updated concussion protocol : NPR
National Football League Head, Neck and Spine Committee's Concussion Diagnosis and Management Protocol: 2017-18 season | British Journal of Sports Medicine
NFLPA fires neurotrauma consultant who evaluated Dolphins' Tagovailoa for concussion against Bills: reports | CBC Sports
Tua Tagovailoa's head injury puts NFL concussion protocol under scrutiny - The Washington Post
NFL Concussion Protocol After Miami Dolphins Quarterback Tua Tagovailoa - Bloomberg
Concussion | England Football
Majority of Americans Support Changing the NFL Concussion Protocol
Protecting players? A look at the NFL's concussion protocol
NFL concussion protocol: What happens in those blue sideline tents?
How does NFL's concussion protocol work? Questions surrounding Tua Tagovailoa - The Athletic