1. Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital , Liverpool , UK
2. Department of Cardiology, Liverpool Heart & Chest Hospital NHS Foundation Trust , Thomas Drive, Liverpool L14 3PE , UK
3. Ordensklinikum Linz Elisabethinen , Linz , Austria
4. Department of Cardiac Electrophysiology, AIG Hospitals , 1-66/AIG/2 to 5, Mindspace Road, Gachibowli Hyderabad, Telangana 500032 , India
5. Grandview Medical Center, Arrhythmia Institute at Grandview , 3686 Grandview Parkway Suite 720, Birmingham, AL 35243 , USA
6. Danish Centre for Clinical Health Services Research, Aalborg University , Aalborg , Denmark