1. Centers for Disease Control and Prevention. (2018).Web‐based Injury Statistics Query and Reporting System (WISQARS) [online database]. Available from:http://www.cdc.gov/injury/wisqars/[last accessed 19 October 2018].
2. Dealing with limited overlap in estimation of average treatment effects
3. Department of Health and Human Services Centers for Disease Control and Prevention(2017a). Bridged‐Race Population Estimates United States July 1st resident population by state county age sex bridged‐race and Hispanic origin. Available from: CDC WONDER database https://wonder.cdc.gov/bridged-race-population.html[last accessed 31 January 2018].
4. Department of Health and Human Services Centers for Disease Control and Prevention. (2017b). Compressed Mortality File (CMF). Available from CDC WONDER database:https://wonder.cdc.gov/mortSQL.html[last accessed 31 January 2018].
5. Department of Labor Bureau of Labor Statistics. (2017).Local Area Unemployment Statistics [Data file]. Available from:https://www.bls.gov/lau/#tables[last accessed 31 January 2018].