1 Department of Emergency Medicine, Washington University in St. Louis School of Medicine, St. Louis, MO, United States of America.
2 Department of Health Behavior and Health Education, College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, United States of America.
3 Department of Emergency Medicine, Alpert Medical School, Brown University, Providence RI, United States of America.
4 Department of Behavioral and Social Science, School of Public Health, Brown University, Providence, RI, United States of America.