Diagnosis and Treatment of Dissociative Identity Disorder (DID) (a.k.a. Multiple Personality Disorder) (MPD), which is commonly hidden or camouflaged 

Comment: The standard professional training of most psychotherapists, psychologists, and psychiatrists does not give them sufficient expertise to successfully diagnose and treat most cases of Dissociative Identity Disorder (DID). The following introductory references are a good beginning to learning about DID/MPD.

Introductory References

1. Frank W. Putnam, M.D. Diagnosis and Treatment of Multiple Personality Disorder. New York, The Guilford Press, 1989.

2. Elaine Ducharme Ph.D., ABPP.  Assessment and Treatment of Dissociative Identity Disorder (DID). Camp Hill, PA. TPI Press, 2015.