1. PC Goodwin, MCSP, is a doctoral student, Centre for Applied Biomedical Research, GKT School of Biomedical Sciences, King's College London, London, United Kingdom
2. MC Morrissey, PT, ScD, is Lecturer, Centre for Applied Biomedical Research, GKT School of Biomedical Sciences, King's College London, Shepherd's House, Guy's Campus, London SE1 1UL, United Kingdom
3. RZ Omar, PhD, is Senior Lecturer, Department of Statistical Sciences, University College London
4. M Brown, MCSP, is Senior I Physiotherapist, Forest Healthcare Trust, London, United Kingdom
5. K Southall, MCSP, is Physiotherapy Manager, Holly House Hospital, Buckhurst Hill, Essex, United Kingdom
6. TB McAuliffe, FRCS, is Orthopaedic Consultant, Forest Healthcare Trust