1. Research Unit for General Practice, Uni Research Health, Bergen, Norway
2. Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
3. National Institute for Health Research Collaborations for Leadership in Applied Health Research and Care West (NIHR CLAHRC West), University Hospitals Bristol NHS Foundation Trust, Bristol, UK
4. Centre for Academic Primary Care, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK