Chiefs involved in concussion study

03 March 2015The Aviva Premiership club's scientific investigation comes in the wake of several recent high-profile concussion cases in rugby union.

World Rugby, the game's governing body, said Wales winger George North should not have remained on the pitch during the RBS 6 Nations opener against England last month after video replays appeared to show he had briefly losing consciousness following a clash of heads with team-mate Richard Hibbard.

The Welsh Rugby Union was cleared of any wrongdoing as World Rugby accepted its explanation that neither the team medical staff nor …