[1] Atrial Fibrillation Clinic, Division of Cardiology, University Hospital, Basel
[2] Department of Medicine, University Hospital, 4031 Basel
[3] Center for Arrhythmia Prevention, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
[4] Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
[5] Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA