1. Postgraduate Medical School, University of Hertfordshire, Hatfield, UK
2. National Heart and Lung Institute, Imperial College, London, UK
3. Interventional Cardiology and Cardiovascular Medicine Research, Department of Cardiology and Internal Medicine, Nicolaus Copernicus University, Bydgoszcz, Poland
4. Faculty of Medicine, University of Alberta, Edmonton, Canada
5. Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
6. Cardiovascular Medicine, Catholic University, Rome, Italy