1. Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Thorax Center, Rotterdam, the Netherlands (J.F.V., J.J.B.).
2. Department of Cardiology, Maastricht University Medical Center, Maastricht, the Netherlands (H.-P.B.-L.R.).
3. Hospital Group Twente, Department of Cardiology, Almelo and Hengelo, the Netherlands (G.C.M.L.).
4. Albert Schweitzer Ziekenhuis, Department of Cardiology, Dordrecht, the Netherlands (M.W.F.V.G.).
5. Department of Cardiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands (A.W.H.).