1Department of Emergency Medicine, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA (A.M.C., J.EH.). Annamarie.chang@jefferson.edu.
2Department of Radiology, Perelman School of Medicine of the University of Pennsylvania, Philadelphia (H.I.L.).
3Center for Statistical Sciences (B.S.S., C.G.).
4Department of Biostatistics (C.G.).
5Brown University School of Public Health, Providence, RI. Novartis Institutes for BioMedical Research, Cambridge, MA (E.M.G.).
6Department of Emergency Medicine, Wake Forest School of Medicine, Winston-Salem, NC (C.D.M.).
7Department of Radiology, Pennsylvania State Hershey Medical Center (H.S.).
8Johns Hopkins School of Medicine, Baltimore, MD (K.J.O.).
9Department of Emergency Medicine, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA (A.M.C., J.EH.).
0Department of Emergency Medicine, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA (A.M.C., J.EH.). Annamarie.chang@jefferson.edu.
