'If you have that suspicion, he's off and he stays off' - Barry O'Driscoll speaks to Paul Kimmage about concussion

Dr O'Driscoll, who is the uncle of Ireland and British and Irish Lions centre great Brian O'Driscoll, told BBC Breakfast News that he was particularly concerned for Wales wing George North, who suffered two heavy blows to the head in Friday's Six Nations loss to England - a recent report on the BBC website