1. Interventional Fellow, Department of Cardiology, Leeds General Infirmary, Great George Street, Leeds, LS1 3EX, United Kingdom
2. Department of Cardiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
3. Department of Cardiology, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
4. Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom