Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
5-HTTLPR genotype interacted with dual stressful life events to increase the risk for posttraumatic stress disorder (PTSD) in both European American and African American individuals. The numbers of patients with PTSD of the total numbers of participants in the group are shown.
