1 From the R Adams Cowley Shock Trauma Center (C.J.F., D.V.F.), Baltimore, Maryland; University of Kansas Medical Center (J.L.H.), Kansas City, Kansas; Cedars-Sinai Medical Center (E.J.L.), Los Angeles, California; Riverside University Health System Medical Center (R.C.), Riverside, California; University of Southern California (M.S., K.I., M.J.M.), Los Angeles, California; Medical College of Wisconsin (M.M.), Milwaukee, Wisconsin; University of Texas McGovern Medical School (L.J.M.), Houston, Texas; Dell Medical School, University of Texas at Austin (C.V.R.B.), Austin, Texas; University of Arizona College of Medicine (N.K.), Phoenix, Arizona; Scripps Mercy Hospital (K.A.P.), San Diego, CA; Children's Hospital (N.G.R.), Cincinnati, Ohio; and St. Joseph's Hospital and Medical Center (J.A.W.), Phoenix, Arizona.