- National Center for PTSD - a program of the U.S. Department of Veterans Affairs.
- Sidran Foundation - resources for persons with dissociative disorders and treating professionals. extensive catalog of books and videos on trauma, post-traumatic stress disorder, dissociative identity disorder (MPD), child sexual abuse.
- International Society for the Study of Dissociation - brings together professionals dedicated to the search for answers to improve the quality of life for all patients with dissociative disorders.
- Colin A. Ross Institute - formed to further the understanding of psychological trauma and its consequences by providing educational services, research, and clinical treatment of trauma based disorders.
- New England Society for the Study of Dissociation - providing educational, training, and networking opportunities for the mental health and social science professionals who are its members.
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