1. Royal Melbourne Hospital, Department of Cardiology, Parkville VIC 3050; Melbourne Australia
2. Department of Cardiology; Belfast Health and Social Care Trust; Belfast Ireland
3. Freeman Hospital; Cardiothoracic Services, Newcastle upon Tyne England
4. Institute of Cellular Medicine, Newcastle University; Newcastle upon Tyne England
5. Division Cardiology; St Michael's Hospital, University of Toronto; Canada
6. The London Chest Hospital, Barts Health NHS Trust; London England United Kingdom
7. Golden Jubilee National Hospital, West of Scotland Regional Heart and Lung Centre; Glasgow Scotland
8. Ninewells Hospital; Dundee Scotland
9. Bristol Heart Institute; Bristol United Kingdom
10. Forth Valley Royal Hospital; Larbert United Kingdom