Changes

'''Posttraumatic stress disorder (PTSD)''' was not recognized as a disease until 1980, when the American Psychiatric Association created a new classification of disease.<ref name="dsm1980">{{REFbook |last=American Psychiatric Association |first= |year=1980 |title=Diagnostic and Statistical Manual of Mental Disorders |url= |pages= |isbn= |accessdate=2021-08-08 }}</ref><ref name="vanderkolk2014">{{REFbook