1. Department of Cardiothoracic SurgeryOxford University Hospitals NHS Foundation TrustOxford United Kingdom
2. Department of Cardiothoracic SurgeryUniversity of OxfordOxford United Kingdom
3. Centre for Statistics in Medicine, Botnar Research CentreUniversity of OxfordOxford United Kingdom
4. Department of Cardiac AnaesthesiaOxford University Hospitals NHS Foundation TrustOxford United Kingdom
5. Department of CardiologyOxford University Hospitals NHS Foundation TrustOxford United Kingdom