Department of Cardiology and Intensive Care, Jessa Ziekenhuis, Faculty of Medicine and Life Sciences at the Hasselt University, Hasselt, Belgium. Electronic address: pascal.vranckx@jessazh.be. Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland. Atrial Fibrillation Network, Munster, Germany; Department of Cardiology and Angiology, Division of Electrophysiology, University of Munster, Munster, Germany. Department of Cardiology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands; Cardialysis, Rotterdam, Netherlands. Atrial Fibrillation Network, Munster, Germany; Department of Cardiology, Hospital Munich South, Munich, Germany; University of Bonn, Bonn, Germany. Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Department of Advanced Biomedical Sciences, Federico II University of Naples, Naples, Italy. Department of Cardiology, Kyiv City Clinical Hospital #5, Kiev, Ukraine. Cardiovascular Institute, Azienda Ospedaliero-Universitaria di Ferrara, Cona, Venice, Italy; Maria Cecilia Hospital, GVM Care and Research, Cotignola, Italy. Department of Cardiac Rehabilitation, Oleksandrivska Kyiv City Clinical Hospital, Kiev, Ukraine. Department Internal Medicine No2 and Nursing, Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine; Department of Anesthesiology with Wards of Intensive Care, Ivano-Frankivsk Regional Clinical Cardiological Clinic, Ivano-Frankivsk, Ukraine. Center for Cardiovascular Research and Development, American Heart of Poland Katowice, Poland; The Jerzy Kukuczka Academy of Physical Education, Faculty of Physiotherapy, Katowice, Katowice, Poland. Daiichi Sankyo Europe, Munich, Germany. Atrial Fibrillation Network, Munster, Germany; Cardiology and Intensive Care Medicine, St Vincenz-Hospital, Paderborn, Germany; Working Group of Molecular Electrophysiology, University Hospital Magdeburg, Magdeburg, Germany. Electronic address: andreas.goette@vincenz.de.