1. From the The Cardiac Catheterization Laboratory (C.K., N.K., A.W., B.K., V.C.), Division of Cardiology, Tufts Medical Center; The Hemostasis and Thrombosis Laboratory (P.Z., L.C., A.K.), Division of Hematology/Oncology, Molecular Oncology Research Institute, Tufts Medical Center; and the Department of Medicine and Biochemistry (L.C., A.K.), Tufts Medical School, Boston, Massachusetts.