References: Silver, R.C., Holman, A., McIntosh, D.N., Poulin, M., and Gilrivas, V. (2002). Nationwide Longitudinal Study of Psychological Responses to September 11. Journal of the American Medical Association, Vol. 228, pp. 1235-1244.

Written by Based on research by Silver, Roxane C., Holman, A., McIntosh, D.N., Poulin, M., and Gilrivas, V. (2002), adapted by Juanita N Baker, Ph.D.