A dubious paper just published in Molecular Neurobiology makes the suggestion that all military recruits should be offered genetic testing to assess their risk of PTSD. According to the authors, Kenneth Blum et al.,

We hypothesize that, even before combat, soldiers with a childhood background of violence (or with a familial susceptibility risk) would benefit from being genotyped for high-risk alleles (DNA variants). This process may assist us in identifying potential military candidates who