1. Medical School, University of Ioannina, Ioannina, Greece
2. Cardiovascular Research Institute, Ioannina and Athens, Greece
3. Department of Cardiology, Medical School, University of Ioannina, Ioannina, Greece
4. Department of Engineering Informatics and Telecommunications, Computational Cardiology and Modeling, University of Western Macedonia, Kozani, Greece
5. Second Department of Cardiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
6. Department of Informatics & Telecommunications Technology, Technological Educational Institute of Epirus, Arta, Greece
7. ELPEN Research Laboratory, Pikermi, Athens, Greece