1. Erasmus MC, University Medical Center Rotterdam, the Netherlands (R.M.O., K.M.A., M.d.M., R.H.v.S., M.L.S., E.B.).
2. Medical Center Alkmaar, the Netherlands (V.A.U.).
3. Maastricht University Medical Center, the Netherlands (B.K.).
4. HagaZiekenhuis, Den Haag, the Netherlands (C.S.).
5. Reinier de Graaf Hospital, Delft, the Netherlands (E.R.).
6. Zuyderland Hospital, Heerlen, the Netherlands (T.L.).
7. Sint Franciscus Gasthuis, Rotterdam, the Netherlands (A.L.).
8. Admiraal de Ruyter Hospital, Goes, the Netherlands (D.H.).
9. University Medical Center Groningen, the Netherlands (P.v.d.H.).
10. University Medical Center Utrecht,the Netherlands (F.W.A., I.E.H., P.A.D.).
11. Gelre Hospital, Zutphen, the Netherlands (A.M.).
12. Canisius-Wilhelmina Hospital, Nijmegen, the Netherlands (A.J.O.O.).
13. Working Group on Cardiovascular Research Netherlands, Utrecht, the Netherlands (A.J.O.O.).
14. Havenziekenhuis, Rotterdam, the Netherlands (B.I.).
15. St. Jansdal Hospital, Harderwijk, the Netherlands (R.D.).
16. Academic Medical Center, Amsterdam, the Netherlands (R.J.d.W.).
17. Treant Zorggroep, location Bethesda, Hoogeveen, the Netherlands (S.H.K.T.).
18. Medisch Centrum Haaglanden location Westeinde, Den Haag, the Netherlands (A.J.W.).
19. Elizabeth-Tweesteden Hospital, Tilburg, the Netherlands (W.H.).
20. Radboud University Medical Center Nijmegen, the Netherlands (E.C.).
21. Netherlands Heart Institute, Utrecht (P.A.D.).