FILE - In this Oct. 17, 1996, file photo Buffalo Sabres captain Pat LaFontaine skates to the bench with a concussion sustained when he hit the ice after taking a hard check during a game in Buffalo, N.Y. Concussions, which ended the Hall of Fame career of players like LaFontaine, were the major theme of a two-day summit on hockey concussions this week at the Mayo Clinic, where more than 250 doctors, scientists and hockey officials talked about the latest research and strategized on ways to cut down on concussions, especially in youth hockey. (AP Photo/John Hickey, file)