1. Division of Cardiology, Department of Medical and Health Sciences, Linköping Heart Centre, University Hospital, SE 581 85 Linköping, Sweden
2. Department of Medicine, McMaster University, Hamilton, Canada
3. Postgraduate Medical School, Grochowski Hospital, Warsaw, Poland
4. Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
5. Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands