1. Department of Trauma and Orthopaedic Surgery, Royal Alexandra Hospital, NHS Greater Glasgow and Clyde, UK
2. Department of Trauma and Orthopaedic Surgery, Ninewells Hospital, NHS Tayside, UK
3. Department of General Surgery, Cumberland Infirmary Hospital, UK
4. Department of General Surgery, Royal Victoria Hospital, UK
5. University of California, Los Angeles (UCLA), Department of Neurology, USA
6. University of California, Davis (UC Davis), Department of Neurology, USA
7. Center for Mind & Brain (UC Davis) California, USA