1. Department of Cardiac Electrophysiology, NIHR Cardiovascular Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust; Imperial College London; London UK
2. Department of Cardiology, NIHR Cardiovascular Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust; Imperial College London; London UK
3. Department of Clinical Biochemistry, NIHR Cardiovascular Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust; Imperial College London; London UK