1 Department of Emergency Medicine, Department of Pediatrics, University of California San Francisco, 550 16th Street, Box 0649, San Francisco, CA 94143, USA. Electronic address: mimi.lu@ucsf.edu.
2 Department of Emergency Medicine, David Geffen School of Medicine at UCLA, Physician Specialist Harbor-UCLA, 3032 Haddington, Los Angeles, CA 90064, USA. Electronic address: iaclaudius@gmail.com.
3 Department of Emergency Medicine, Goryeb Children's Hospital/, Morristown Medical Center, Department of Emergency Medicine and Pediatrics, Sidney Kimmel Medical College, 100 Madison Avenue, Box #8, Morristown, NJ 07960, USA. Electronic address: christopher.amato@atlantichealth.org.