1. From CHU Sart-Tilman, Liège, Belgium (V.M.G.L.); University Medical Center Erasmus (P.W.S.) and Cardialysis (W.L., B.B.), Rotterdam, the Netherlands; Klinik für Herzchirurgie, Landeskliniken, Salzburg, Austria (F.U.); University Medical Center Utrecht, Utrecht, the Netherlands (B.A.v.H.); Ziekenhuis Oost Limburg, Genk, Belgium (M.C.M.V., G.M.P.F.); Skejby Sygehus, Aarhus, Denmark (T.T.N., P.K.P.); and Hospital de la Santa Cruz, Linda A. Velha, Portugal (R.S.G., J.M.G.Q.M., J.P.M.S.N.).