1. Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Denmark (L.N.-C., J.L., D.E.H., K.A.A., L.E.B., S.H., K.K., L.K., N.V., L.H., T.E.)
2. Department of Cardiology, Zealand University Hospital, Roskilde, Denmark (H.K.)
3. Department of Cardiology, University of Lund, Sweden (T.E.).