Funding for this research was provided by:
National Center for Injury Prevention and Control (R49 CE002096)
Received: 26 August 2019
Accepted: 11 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: This study was deemed not human subjects research Under 45 CFR 46 by the Columbia University Institutional Review Board (New York, NY).
: Not Applicable.
: Dr. Guohua Li serves as editor-in-chief of the journal, Injury Epidemiology, and was not involved in the review or handling of this manuscript. The authors have no other competing interests to disclose.