1. Department of Medical Sciences, Uppsala University, Uppsala, Sweden
2. Arrhythmia Section, Cardiology Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
3. IDIBAPS, Institut d'Investigació August Pi i Sunyer (IDIBAPS), Barcelona, Spain
4. Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
5. Department of Electrophysiology, Heart Center Leipzig, Leipzig, Germany
6. EURObservational Research Programme, European Society of Cardiology, Sophia-Antipolis, France
7. Heart-Lung Centre, Department of Cardiology, Leiden University Medical Centre, RC, Leiden, The Netherlands
8. Department of Cardiology, Institution of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
9. Maria Cecilia Hospital, GVM Care&Research, Cotignola, Italy
10. Arrhythmia Department and EP Laboratory, State Research Institute of Circulation Pathology, Novosibirsk, Russian Federation
11. Clinica Mediterranea, Naples, Italy