1. From the Department of Anesthesiology (M.L.B.) and Department of Pathology (R.A.C.), University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pathology, University of Pittsburgh and Institute for Transfusion Medicine, Pittsburgh, Pennsylvania (M.H.Y.); and Departments of Anesthesiology and Bioengineering and McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburg