1. Institute of Cardiovascular Sciences, University of Birmingham , Birmingham , UK
2. Health Data Research UK Midlands, Queen Elizabeth Hospital, University Hospitals Birmingham NHS Foundation Trust , Birmingham , UK
3. Institute of Applied Health Sciences, University of Birmingham , Birmingham , UK
4. Clinical Practice Research Datalink, Medicines and Healthcare products Regulatory Agency , London , UK
5. Patient and Public Involvement team , Birmingham , UK
6. Primary Care Clinical Research, NIHR Clinical Research Network West Midlands , Birmingham , UK