1. Concussion Clinic, Burwood Hospital, Christchurch, New Zealand;
2. Department of Orthopaedic Surgery and Musculoskeletal Medicine, University of Otago Christchurch, Christchurch, New Zealand;
3. Rehabilitation Teaching and Research Unit, University of Otago Wellington, Wellington, New Zealand;
4. Department of Psychological Medicine, University of Otago Christchurch, Christchurch, New Zealand;
5. Faculty of Health and Environmental Studies, AUT University, Auckland, New Zealand