1 From the Program in Trauma and Department of Surgery (D.M.S.), University of Maryland School of Medicine; Department of Surgery (J.S.U., O.G.), Vanderbilt University Medical Center; Department of Surgery (D.H.L.), Rutgers-New Jersey Medical School; Departments of Pathology (J.A.), Microbiology and Immunology and Pediatrics, Vanderbilt University Medical Center; Department of Surgery (E.M.B.), University of Washington; Department of Surgery (M.J.C.), University of Colorado School of Medicine; Department of Surgery (B.J.E., D.H.J.), University of Texas Health Science Center at San Antonio; Department of Pathology (M.J.F.), University of Maryland School of Medicine; Laboratory Medicine and Pathology (J.R.H.), University of Washington; Department of Surgery (K.L.K.), University of California, San Francisco - Fresno; Department of Surgery (M.L.N.), Children's Hospital of Philadelphia; Department of Surgery and Critical Care Medicine (P.C.S.), University of Pittsburgh; Department of Surgery (B.L.Z.), University of Wisconsin School of Medicine and Public Health; Department of Surgery (D.Z.), Oregon Health & Science University; and Department of Surgery (R.C.), Loma Linda University School of Medicine, Riverside University Health System Medical Center.