1. Department of Cardiology, Heart Center, Segeberger Kliniken, Bad Segeberg, Germany (M.A.-W., R.T., V.G., A.A., M.A., D.S.S., G.R.).
2. Department of Cardiology, Heart Center Leipzig, Leipzig University Hospital, Germany (M.A.-W., D.S.S.).
3. Department of Cardiology, Deutsches Herzzentrum München, Technical University of Munich, Germany (R.A.B., T.R., A.K.).
4. German Center for Cardiovascular Research, partner site Munich Heart Alliance, Germany (R.A.B., A.K.).
5. Department of Cardiology, Vivantes Wenckebach Hospital, Berlin, Germany (M.E.-M.).
6. Department of Mathematics, University of Sussex, Brighton, United Kingdom (D.R.R.).