Jeannie L. Callum, MD, FRCPC, is a Transfusion Medicine Specialist and Hematologist at Sunnybrook Health Sciences Center in Toronto and Professor in the Department of Laboratory Medicine and Pathobiology at the University of Toronto. She is the Director of Utilization for the Department of Laboratory Medicine and Molecular Diagnostics. She also serves as the sponsor lead for the Ontario Regional Blood Coordinating Network for Central Ontario. Her primary interests in transfusion medicine include error tracking and the management of the coagulopathy associated with traumatic injury and post cardiac surgery. 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 preparing its fourth edition. In addition, she is on the editorial board for the “Transfusion Medicine Reviews” and “Transfusion” journals.