1. Editorial & Methods Department; Cochrane Central Executive; London UK
2. Centre for Biostatistics; The University of Manchester, Manchester Academic Health Science Centre; Manchester UK
3. East Lancashire Hospitals NHS Trust; Burnley UK
4. School of Medicine; University of Central Lancashire; Preston, Lancashire UK
5. Parent Co-investigator; Warrington UK
6. Health Education North West (Mersey); Liverpool UK
7. Faculty of Health and Life Sciences; University of Liverpool; Liverpool UK
8. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS); University of Oxford; Oxford UK
9. Department of Orthopaedic Surgery; Alder Hey Hospital; Liverpool UK