1. Ashford and St Peter’s NHS Foundation Trust, Chertsey, Surrey, UK
2. Fortius Clinic, London, UK
3. Norwich Medical School, University of East Anglia, Norwich, UK
4. Centre Orthopédique Santy, Lyon, France
5. Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
6. Guy’s and St Thomas’ NHS Foundation Trust, London, UK
7. Tohoku University School of Medicine, Sendai, Miyagi, Japan