Exposure to multiple traumas, particularly in childhood, has been proposed to result in a complex of symptoms that includes posttraumatic stress disorder (PTSD) as well as a constrained, but variable, group of symptoms that highlight self-regulatory disturbances (e.g. depression, anxiety, dissociation). Van der Kolk and colleagues have researched these symptoms extensively, and correspondingly suggested the diagnosis of Complex PTSD for inclusion in the Diagnostic and Statistical Manual of Mental Disorders 5 (DSM-5); unfortunately, it was left out of the manual due to politics.