Jeannie Callum, MD, FRCPC, is a Transfusion Medicine Specialist and Hematologist at Sunnybrook Health Sciences Center in Toronto and Associate Professor in the Department of Laboratory Medicine and Pathobiology at the University of Toronto. She is also the Director of Utilization for the Department of Laboratory Medicine and Molecular Diagnostics at Sunnybroook Health Sciences Centre (tasked to curtail inappropriate use of laboratory tests). She also serves as the sponsor lead for the Ontario Regional Blood Coordinating Network for Central Ontario. Her primary research interests in transfusion medicine include error tracking and the management of the coagulopathy associated with traumatic injury and post cardiac surgery. She was involved in the development of the U.S. Biovigilance Network and the Canadian Transfusion Error Surveillance System. She has been involved with numerous transfusion clinical trials including ABLE, PROPPR, FIIRST, TACS and FIBRES. She has written extensively about issues in transfusion medicine, publishing more than 100 peer-reviewed articles and authoring numerous book chapters. She also was the lead author on the Provincial (Ontario) transfusion handbook titled “Bloody Easy,” now in its fourth edition. In addition, she is on the editorial board for the “Transfusion Medicine Reviews” and “Transfusion” journals. She earned her medical degree and completed a fellowship in internal medicine and hematology at the University of Toronto. In addition, she completed transfusion medicine fellowship training with Canadian Blood Services.