"With DSM-V, psychiatry firmly regressed to early 19th-century medical practice. Despite the fact that we know the origins of many of the problems it identifies, its diagnoses describe surface phenomena but completely ignore the underlying causes. Even before DSM-V was released, the American Journal of Psychiatry published the results of validity tests of various new diagnoses which indicated that the DSM largely lacks what, in the world of science is known as, 'reliability', that is, the ability to produce consistent, replicable results. In other words, it lacks scientific validity." ― Bessel Van Der Kolk, M.D.