Department of Medicine, Western University, London, ON, Canada. Department of Oncology, Lakeridge Health, Oshawa, ON, Canada. Department of Radiation Oncology, Western University, London, ON, Canada. Department of Medicine, Division of Hematology, Western University, London, ON, Canada. Department of Epidemiology and Biostatistics, Western University, London, ON, Canada. London Health Sciences Centre, London, ON, Canada. Department of Pathology & Laboratory Medicine, Western University, London, ON, Canada.