Song M, et al. - In this cross-sectional survey, the researchers intended to analyze the connection between childhood trauma and lifetime prevalence of traumatic brain injury (TBI) among individuals who are homeless. They reported that childhood trauma was significantly correlated with a lifetime prevalence of TBI in homeless populations in British Columbia, Canada, indicating an added level of vulnerability in this population. For this particularly vulnerable population, these findings suggested a potential role for childhood trauma prevention strategies and services mindful of the patients' history of trauma.