1. British Heart Foundation Cardiovascular Research Centre, University of Glasgow Glasgow UK
2. Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School Boston MA USA
3. Novartis Pharmaceuticals Corporation East Hanover NJ USA
4. Institut de Cardiologie de Montréal, Université de Montréal Montreal Quebec Canada
5. Minneapolis VA Center for Care Delivery and Outcomes Research, University of Minnesota Minneapolis MN USA
6. Medical University of South Carolina and Ralph H. Johnson Veterans Administration Medical Center Charleston SC USA