1. Department of Medicine, Hospital of Assisi, Assisi, Italy
2. Department of Medicine, University of Perugia, Perugia, Italy
3. Department of Cardiology and Cardiovascular Pathophysiology, Hospital S.M. della Misericordia, Perugia, Italy
4. University of Birmingham Institute of Cardiovascular Sciences, City Hospital, Birmingham, UK
5. Boehringer Ingelheim GmbH & Co, Ingelheim am Rhein, Germany
6. Faculty of Medicine Mannheim, University of Heidelberg, Mannheim, Germany
7. Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
8. Sidney Kimmel Medical College at Jefferson University, Philadelphia, PA, USA
9. Medical College and Lankenau Medical Center, Wynnewood, PA, USA
10. McMaster University, Hamilton, Ontario, Canada
11. Department of Cardiology, Maggiore Hospital, Bologna, Italy