1 Department of Medicine, Division of Hematology and Thromboembolism, McMaster University, St. Joseph's Healthcare Hamilton, Room F-544, 50 Charlton Ave East, Hamilton, ON L8N 4A6, Canada.
2 Department of Medicine, Division of Hematology and Thromboembolism, McMaster University, St. Joseph's Healthcare Hamilton, Room F-544, 50 Charlton Ave East, Hamilton, ON L8N 4A6, Canada. Electronic address: jdouket@mcmaster.ca.