The first edition of the Diagnostic and Statistical Manual of Mental Disorders, published in 1952, classified disorders using a format developed by whom?

1. The first edition appeared in 1952, only a few years after the Second World War ended. 2. Its classification followed a format the U.S. Army had developed during that war. 3. The World Health Organization published the rival system, the International Classification of Diseases, not the DSM. 4. The manual is published by the American Psychiatric Association, which is a different body from the American Psychological Association. _Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 15 "Psychological Disorders", section 15.2 Diagnosing and Classifying Psychological Disorders_