1. Department of Infection, Immunity and Cardiovascular Disease, The University of Sheffield, Sheffield, UK
2. Department of Cardiology, Northern General Hospital, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
3. Department of Cardiology, Doncaster and Bassetlaw Teaching Hospitals NHS Foundation Trust, Doncaster, UK
4. Department of Congenital Cardiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK