Diagnostic and statistical manual of mental disorders (dsm) now in its 4th edition, commonly referred to as dsm iv or dsm iv-tr. Bloodletting was part of treatment of all physical problems. In 1939 the world health organization (who) added mental disorders to the international list of causes of death. In 1948 the list was expanded to become the international statistical classification of diseases, injuries and causes of death (icd) a comprehensive listing of all diseases including a classification of ab beh. American psychiatric association published its own diagnostic and statistical manual (dsm) in 1952. In 1969 the who published a new classification system that was more widely accepted. A 2nd version of the american psychiatric associations dsm, dsm-ii was similar to the. The who classifications were simply a listing of diagnostic categories; the actual beh or symptoms that were the bases for the diagnoses were not specified.