1 Divisions of Emergency Medicine and Infectious Diseases, Washington University School of Medicine, 4523 Clayton Avenue, Campus Box 8051, St. Louis, MO 63110, USA. Electronic address: syliang@wustl.edu.
2 Department of Emergency Medicine, Zuckerberg San Francisco General Hospital, University of California San Francisco School of Medicine, 1001 Potrero Avenue, Suite 6A, San Francisco, CA 94110-1377, USA. Electronic address: rachel.chin@ucsf.edu.