ISSTD has professional and self resources, workshops and links that more fully explain the role of dissociation in PTSD. Many trauma resources and programs ignore or pay little head to the critical role of dissociation in both the severity and the healing of PTSD.
Some of the best information about PTSD available in one site.
Besides the traditional definitions, the site includes information on gene research and brain imaging. The focus on drugs to prevent and treat ptsd symptoms is concerning to some trauma experts but awareness of what is being considered is important to all in this field.