1. From the Department of Pathology, Beth Israel Deaconess Medical Center & Harvard Medical School, Boston, MA (A. Asimaki, A.G.K., J.E.S.); Nikos Protonotarios Medical Center, Naxos, Greece (A.P., A.T.); Department of Medicine/Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD (C.A.J., S.P.C., C.T., B.M., A.t.R., D.P.J., H.C.); and First Department of Cardiology, University of Athens Medical School, Athens, Greece (A. Anastasakis).