1. Atrial Fibrillation Network (AFNET), Münster, Germany (K.G.H., B.B., U.S., P.K.).
2. Department of Neurology, Universitätsklinikum Würzburg, Germany (K.G.H.).
3. Institute of Clinical Epidemiology and Biometry, University Würzburg, Germany (F.A.E., P.U.H.).
4. Clinical Trial Center, University Hospital Würzburg, Germany (P.U.H.).
5. Center for Stroke Research Berlin, Charité-Universitätsmedizin Berlin, Germany (J.B.F.).
6. Department of Neuroradiology, University of Erlangen-Nuremberg, Erlangen, Germany (T.E.).
7. Hospital of the University of Pennsylvania, Philadelphia (D.C.).
8. Isala Heart Center, Zwolle, The Netherlands (A.E.).
9. Ospedale Generale Regionale F. Miulli, Acquaviva delle Fonti, Italy (M.G.).
10. Gentofte Hospital, Hellerup, Denmark (J.H.).
11. Abteilung für Rhythmologie, Leipzig Heart Center, Germany (G.H.).
12. Department of Biostatistics & Bioinformatics, Duke University School of Medicine, Durham, NC (H.R.A.).
13. Hospital Clinic Barcelona, University of Barcelona, Spain (L.M.).
14. Institut de Recerca Biomèdica August Pi Sunyer (IDIBAPS), Barcelona, Spain (L.M.).
15. CIBER Cardiovascular, Madrid, Spain (L.M.).
16. Department of Cardiology, Aarhus University Hospital, Denmark (J.C.N.).
17. Duke Clinical Research Institute (DCRI), Durham, NC (J.P.P.).
18. Division of Cardiology, Duke University Medical Center, Durham, NC (J.P.P.).
19. Department of Physiology, University Maastricht, The Netherlands (U.S.).
20. Division of Cardiology, Ospedale Dell’Angelo, Mestre-Venice, Italy (S.T.).
21. Department of Cardiology, Jessa Hospitals, Hasselt, Belgium (J.V.).
22. Albert Einstein College of Medicine at Montefiore Hospital, New York (L.D.B.).
23. University of Birmingham Institute of Cardiovascular Sciences, UK (P.K.).
24. Department of Cardiology, University Heart and Vascular Center Hamburg, University Medical Center Hamburg Eppendorf, Germany (P.K.).
25. German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Germany (P.K.).