1. School of Health and Related Research, University of Sheffield, Sheffield, UK
2. Department of Health Sciences, University of York, York, UK
3. Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Cordoba, Spain
4. Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK
5. Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands