1. Royal Brompton and Harefield NHS Foundation Trust, Sydney Street, London SW3 6NP, UK
2. National Heart and Lung Institute, Imperial College, Guy Scadding Building, Cale Street, London SW3 6LY, UK
3. Oxford University Hospital Trust, Headley Way, Headington, Oxford OX3 9DU, UK
4. Department of Prevention and Sports Medicine, University Hospital Klinikum rechts der Isar, Technical University of Munich, Georg-Brauchle-Ring 56, D-80992 Munich, Germany
5. DZHK (German Center for Cardiovascular Research), Partner Site Munich Heart Alliance, Biedersteiner Straße 29, 80802 Munich, Germany
6. Cardiovascular Research Laboratory, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou Street, 11527 Athens, Greece