1. From the Heartcenter (M.J.G., M.C.K., J.J.P., J.G.P.T., K.T.K., J.J.W., R.J.d.W.), and Department of Pathology (X.L., C.E.K., A.C.v.d.W.), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; and Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands (A.V.).