1. Department of Cardiology, University Heart and Vascular Center (A.R., K.B., A.M., P.K.), University Medical Center Hamburg–Eppendorf, Germany.
2. German Center for Cardiovascular Research, Partner Site Hamburg/Luebeck/Kiel, Germany (A.R., K.-H.K., A.M., K.W., P.K.).
3. Atrial Fibrillation Network (AFNET), Münster, Germany (G.B., A.G., K.-H.K., K.W., P.K.).
4. Department of Cardiology II (Electrophysiology), University Hospital Münster, Germany (G.B.).
5. Cardiology Clinical Academic Group, Molecular and Clinical Sciences Research Institute, St George’s University of London, UK (A.J.C.).
6. Department of Cardiology, Maastricht University Medical Center and Cardiovascular Research Institute, The Netherlands (H.J.G.M.C.).
7. St Vincenz Hospital, Paderborn, Germany (A.G.).
8. Working Group of Molecular Electrophysiology, University Hospital Magdeburg, Germany (A.G.).
9. LANS Cardio, Hamburg, Germany (K.-H.K.).
10. Heart Sector, Hygeia Hospitals Group, Athens, Greece (P.V.).
11. Institute of Medical Biometry and Epidemiology (E.V., K.W., A.Z.), University Medical Center Hamburg–Eppendorf, Germany.
12. Institute of Cardiovascular Sciences, University of Birmingham, UK (P.K.).