Published on in Vol 21, No 5 (2019): May
1 Occupational Medicine, University Research Clinic, AmbuFlex/WestChronic, Aarhus University, Herning, Denmark
2 Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
3 University of Exeter Collaboration for Academic Primary Care (APEx), Health Services & Policy Research Group, National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care (South West Peninsula) (PenCLAHRC), University of Exeter, Exeter, United Kingdom
4 Centre for Patient Reported Outcomes Research, Institute of Applied Health Research, University of Birmingham, Edgbaston, Birmingham, United Kingdom
5 NIHR Birmingham Biomedical Research Centre and NIHR Surgical Reconstruction and Microbiology Research Centre, University of Birmingham, Edgbaston, Birmingham, United Kingdom