1. Internal Medicine and Cardiology Section, Air Force Centre of Aerospace Medicine , Strasse der Luftwaffe 322, 82256 Fuerstenfeldbruck , Germany
2. Departments of Cardiology and Electrophysiology, Bundeswehr Central Hospital , Koblenz , Germany
3. Departments of Cardiology and Electrophysiology, Joint Hospital Group (South East), Frimley Park Hospital , Camberley , UK
4. Aviation Medicine Clinical Service, Centre of Aviation Medicine, RAF Henlow , Bedfordshire , UK
5. Department of Cardiology, Oxford University Hospital , Headley Way, Oxford , UK
6. Department of Electrophysiology, Oxford University Hospital , Headley Way, Oxford , UK
7. Department of Cardiology, Royal Brompton Hospital , London , UK
8. School of Biomedical Engineering and Information Sciences, Kings College , London , UK