1 University of Exeter Medical School, Royal Cornwall Hospital, Truro, UK h.dalal@nhs.net.
2 Primary care Research Group, University of Exeter Medical School, St Luke's Campus, Exeter, UK.
3 Department of Health Sciences, University of York, York, UK.
4 REACH-HF Patient and Public Involvement Group, c/o Research & Development, Royal Cornwall Hospitals NHS Trust, Truro, UK.
5 MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK.