1. British Heart Foundation Cardiovascular Research Centre; University of Glasgow; Glasgow UK
2. University of Groningen, Department of Cardiology; University Medical Centre Groningen; Hanzeplein 1 9700RB Groningen the Netherlands
3. Centre for Heart Failure Research, Department of Cardiology; Oslo University Hospital Rikshospitalet; Oslo Norway
4. Sahlgrenska University; Hospital; Gothenburg Sweden
5. National Heart and Lung Institute; Royal Brompton and Harefield Hospitals, Imperial College; London UK
6. Department of Cardiology, Pitie Salpetriere Hospital; University Pierre et Marie Curie; Paris France
7. University of Gothenburg; Gothenburg Sweden