Schultz, Jr, MPH, D. G., Mihelic, M. R. and Mihelic, MD, F. M. (2007) “A relationship between US healthcare worker smallpox vaccination rates in 2003 and presidential election results in 2004”, American Journal of Disaster Medicine, 2(4), pp. 189–194. doi: 10.5055/ajdm.2007.0028.