1. Malcolm Fisher Department of Intensive Care Medicine, Royal North Shore Hospital, St Leonards, New South Wales, Australia
2. The George Institute, Newtown, New South Wales, Australia
3. Department of Orthopaedic Surgery, Prince of Wales Hospital, Randwick, New South Wales, Australia
4. Neuroscience Research Australia, Randwick, New South Wales, Australia
5. John Walsh Centre for Rehabilitation Research, Kolling Institute, Northern Sydney Local Health District and The University of Sydney, Sydney, Australia
6. Department of Neurosurgery, Royal North Shore Hospital, St Leonards, New South Wales, Australia