PTSD assessment and DNA collection for GWAS analysis were performed by each study following their protocols. A description of the studies included and the phenotypic and genotyping methods for each study are provided in the Supplementary Note and Supplementary Table 1. We complied with relevant ethical regulations for human research. All participants provided written informed consent, and studies were approved by the relevant institutional review boards and the UCSD IRB (protocol #16097×).
