1. First Department of Cardiology Medical School University of Ioannina Ioannina Greece
2. Second Department of Cardiology Laboratory of Cardiac Electrophysiology “Evangelismos” General Hospital of Athens Athens Greece
3. Department of Medicine and Therapeutics Chinese University of Hong Kong Hong Kong China
4. Faculty of Medicine Li Ka Shing Institute of Health Sciences Chinese University of Hong Kong Hong Kong China
5. Third Department of Cardiology Hippokration Hospital Medical School Aristotle University of Thessaloniki Thessaloniki Greece
6. Cardiology Department Serres General Hospital Serres Greece
7. Department of Cardiology Tianjin Institute of Cardiology Second Hospital of Tianjin Medical University Tianjin China