1. Unit of Medical Technology and Intelligent Information Systems, Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece
2. Department of Computer Science, University of Ioannina, Ioannina, Greece
3. Biomedical Research Institute – FORTH, GR Ioannina, Greece
4. Michaelidion Cardiac Center and Department of Cardiology, Medical School, University of Ioannina, GR Ioannina, Greece
5. Department of Academic Cardiology, Castle Hill Hospital, Cottingham, East Yorkshire, UK
6. Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
7. National Technical University of Athens, Athens, Greece
8. Institute of Clinical Physiology, National Research Council, Pisa, Italy