1. From the Department of Medicine, Division of Hematology and Thromboembolism, McMaster University, Hamilton, Ontario, Canada (D.S., J.Y., J.D.D., W.L.); Department of Medicine, Henry Ford Hospital, Detroit, MI (S.K.); and Department of Medicine, Division of Hematology/Oncology, James P. Wilmot Cancer Center, University of Rochester, Rochester, NY (A.C.S.).