These guidelines have been endorsed by the following organizations: the NFL players association, (NFLPA) National Association of Athletic Trainers, (NATA) the American Football Coaches Association, the Neurocritical Care Society, the Child Neurology Society, the National Association of Emergency Medical Service Physicians, the National Association of School Psychologists, as well as the Child Neurology Society.

FORBES: Safety Prevails -- In Updated Guidelines To Manage Concussions

The guidelines are endorsed by the American Football Coaches Association, the National Association of Emergency Medical Service Physicians and the National Football League Players Association.

WSJ: Tougher Rules Advised for Athletes After Concussion