Thursday's health and safety news from the world of football:
- USA Today's Christine Brennan wrote that memories of hits to the head are worrying a number of former NFL players.
- University of Montreal neuropsychologist Dave Ellemberg, who is leading a cause for zero tolerance for violence in Quebec sports, including youth football, the Montreal Gazette reported.
- WKYC-TV in Cleveland reported on the Cleveland Clinic's new agreement with the NFLPA to help former players.
- Chicago Grid looked at two start-up businesses in the Chicago area that are trying to create devices to better diagnose concussions.
- U.S. News and World Report examined depression among youth football players and looked at guidelines for such cases by the National Athletic Trainers Association.
-- Bill Bradley, contributing editor