1 Department of Anesthesiology, Critical Care Medicine, Johns Hopkins Health System Patient Blood Management Program, The Armstrong Institute for Patient Safety and Quality, Johns Hopkins Medicine, Baltimore, MD, USA. Electronic address: sfrank3@jhmi.edu.
2 Department of Pathology and Laboratory Medicine, Division of Transfusion Medicine and Cellular Therapy and Clinical Laboratories, Department of Pathology, NewYork-Presbyterian Hospital, Weill Cornell Medicine, New York, NY, USA.