Daley, W., Brown, S., Archer, P., et al. (2005). Risk of Tornado-Related Death and Injury in Oklahoma, May 3, 1999. American Journal of Epidemiology. 161(12): 1144-1150.
On May 3, 1999, powerful tornadoes, including a category F5 tornado, swept through Oklahoma. The authors examined all tornado-related deaths, hospital admissions, and emergency department visits to identify important risk factors.