McMaster Centre for Transfusion Research, McMaster University, Hamilton, ON, Canada. Canadian Blood Services, Medical Office, Hamilton, ON, Canada. Division of Hematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, ON, Canada. Division of Critical Care, Department of Medicine, McMaster University, Hamilton, ON, Canada. Department of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, ON, Canada. Department of Oncology, McMaster University, Hamilton, ON, Canada. Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada. Centre for Innovation, Canadian Blood Services, Edmonton, AB, Canada.