1. Maastricht University Medical Centre Department of Cardiology and Cardiovascular Research Centre Maastricht (CARIM), , Maastricht, The Netherlands
2. University of Adelaide and Royal Adelaide Hospital Centre for Heart Rhythm Disorders, , Adelaide, Australia
3. Smidt Heart Institute, Cedars Sinai Medical Center (CMA) Department of Cardiology, , Los Angeles, CA, USA
4. University College London and Barts Heart Centre Department of Cardiology, , London, UK