“In spite of severe headache, vomiting and disorder of micturition, he remained on duty for more than two months. He then collapsed altogether after a very trying experience, in which he had gone out to seek a fellow officer and had found his body blown to pieces, with head and limbs lying separated from his trunk.”

This description of a World War I officer suffering from horrific nightmares was written by the psychologist W.H.R. Rivers in his classic study, “The Repression of War Experience,” published in The Lancet medical journal in 1918.

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