1 From the *Director KIDclot Program, University of Alberta, Stollery Children's Hospital, Edmonton, Alberta; †Department of Surgery, Division of Cardiac Surgery, Nemours Children's Hospital, Orlando, Florida; ‡Department of Biomedical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania; §Nazih Zudhi Transplant Institute, Integris Baptist Medical Center, Oklahoma City, OK, VADovations, Inc., Oklahoma City, Oklahoma; ¶Blood Center of Wisconsin; and ‖Department of Medicine, Medical College of Wisconsin.