1. Department of Cardiology, The Heart Centre, Rigshospitalet (K.F.K., D.H., L.K., L.H., S.H., E.J., F.P., L.B., K.S., P.C., J.J.L., L.V.K., T.E.), University of Copenhagen, Denmark.
2. Department of Cardiology, Zealand University Hospital, Roskilde, Denmark (H.K., H.E., S.K.T.).
3. Department of Cardiology, Herlev and Gentofte Hospitals (P.R.H., C.T.-P., S.G., J.B., C.K., T.F.H., U.A., J.S.J., G.G.), University of Copenhagen, Denmark.
4. Department of Cardiology, Bispebjerg and Frederiksberg Hospitals (M.H., O.W.N., I.E.R., O.P.K., I.H.S., M.H.D.V.-L.), University of Copenhagen, Denmark.
5. Department of Cardiology, Hvidovre and Amager Hospitals (J.D.H., T.J., G.G.F.), University of Copenhagen, Denmark.
6. Department of Cardiology, Hillerød Hospital (R.S., B.J.), University of Copenhagen, Denmark.
7. Department of Cardiology, Glostrup Hospital (J.A., S.L.), University of Copenhagen, Denmark.