1. Department of Cardiology, Western Infirmary; University of Glasgow; Glasgow G11 6NT Scotland UK
2. Karolinska Hospital; Stockholm Sweden
3. Brigham and Women's Hospital; Boston MA USA
4. Department of Medicine; Sahlgrenska University Hospital/Östra; Goteborg Sweden
5. Duke University Medical Center; Durham NC USA
6. HGM-McMaster Clinic; Hamilton Ont. Canada
7. AstraZeneca, R&D, Moindal; Sweden
8. AstraZeneca LP; Wayne PA USA