Affiliation: | ? Department of Emergency Medicine, Jacobi Medical Center, Bronx, New York;† Department of Emergency Medicine, Montefiore Medical Center, Bronx, New York;‡ Department of Emergency Medicine, Highland General Hospital, Oakland, California;§ Department of Emergency Medicine, New York-Presbyterian Hospital, New York, New York;‖ Department of Emergency Medicine, Baystate Medical Center, Springfield, Massachusetts;¶ Department of Emergency Medicine, Brigham and Women''s Hospital, Boston, Massachusetts;# Department of Emergency Medicine, San Francisco General Hospital, San Francisco, California;?? Department of Emergency Medicine, Kaiser Permanente Medical Center, Los Angeles, California;†† Department of Emergency Medicine, Beth Israel-Deaconess Medical Center, Boston, Massachusetts;‡‡ Department of Emergency Medicine, University of Massachusetts Medical Center, Worcester, Massachusetts;§§ Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, New York;‖‖ Department of Emergency Medicine, St. Luke''s-Roosevelt Medical Center, New York, New York;¶¶ Department of Emergency Medicine, Albany Medical Center, Albany, New York |