1. Centre for Academic Primary Care, Population Health Sciences, Bristol Medical School; University of Bristol; Bristol UK
2. Centre for Trials Research; Cardiff University; Cardiff UK
3. Department of Public Health and Primary Care, School of Clinical Medicine; University of Cambridge; Cambridge UK
4. Department of Cardiology; Barts and The London NHS Trust; London UK
5. UCL Partners; Farr Institute of Health Informatics Research; London UK
6. School of Healthcare Sciences; Cardiff University; Cardiff UK