1. Translational and Clinical Research Institute, Newcastle University , Newcastle upon Tyne, UK
2. Children’s Physiotherapy, South Tyneside and Sunderland NHS Foundation Trust , South Shields, UK
3. Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University , Newcastle upon Tyne, UK
4. School of Medicine, Newcastle University , Newcastle upon Tyne, UK
5. Paediatric Rheumatology, Great North Children’s Hospital , Newcastle upon Tyne, UK
6. John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust , Newcastle upon Tyne, UK
7. Manchester Centre for Genomic Medicine, Saint Mary’s Hospital , Manchester, UK
8. Population Health Institute, Newcastle University , Newcastle upon Tyne, UK