Book excerpt: "The importance of examining risk/resilience factors in posttraumatic stress disorder (PTSD) across the lifespan has become increasingly obvious: childhood experiences confer risk/resilience for adulthood experiences and biological predictors and correlates of PTSD appear to differ developmentally." "Research into PTSD has typically been conducted with a focus on either child or adult PTSD, with relatively little overlap or discussion between the two camps. The overall focus of this collection is to bring these two groups of researchers together to examine developmental issues and how they impact biological and psychological risk and resilience factors and treatment issues in PTSD and comorbid disorders."--BOOK JACKET.