Mitigating the impact of sports related head injuries

Does more need to be done to reduce the impact of repeated head injuries in sport? We hear from: a New Zealand researcher who is the director of the Injury Prevention Research Centre at the University of North Carolina, Steve Marshall; an emergency nurse and health researcher who is conducting a second PhD into head injuries in sport in NZ, this time focussing on rugby, Doug King, and; a sports physician, the Medical Director for NZ Rugby and NZ Cricket, Dr Ian Murphy.