Published on in Vol 17, No 12 (2015): December
1 University of Manchester, School of Psychological Sciences, Manchester, United Kingdom
2 Alder Hey Children’s Foundation National Health Service (NHS) Foundation Trust, Department of Rheumatology, Liverpool, United Kingdom
3 University of Manchester, School of Nursing, Midwifery, and Social Work, Manchester, United Kingdom
4 Royal Manchester Children’s Hospital, Department of Rheumatology, Manchester, United Kingdom
5 Arthritis Research United Kingdom Centre for Epidemiology, Centre for Musculoskeletal Research, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
6 National Institute for Health Research (NIHR) Manchester Musculoskeletal Biomedical Research Unit, Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
7 The University of Manchester, Faculty of Life Sciences, Manchester, United Kingdom
8 University of Leeds, Leeds, United Kingdom
*these authors contributed equally