Jasani, MD, G., J. MacNeal, DO, MPH, and J. M. Hirshon, MD, PhD. “Emergency Department Active Shooter Training: A Survey of Current Practices in 2020”. American Journal of Disaster Medicine, vol. 16, no. 4, Dec. 2021, pp. 263-9, doi:10.5055/ajdm.2021.0410.