Psychiatry
That same year, Menninger returned to Topeka and joined his father and older brother, Karl, in their medical practice, which by that time had already begun to specialize in psychiatry. With his contributions, the Menninger Clinic evolved into the Menninger Sanitarium, and eventually into the Menninger Foundation, a non-profit organization which provided not only clinical services to in- and out-patients, but also engaged in research, education, and social outreach.
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