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The Ernst Strüngmann Institute for Neuroscience in Cooperation with Max Planck Society (ESI) is an independent research institute financed by Andreas and Thomas Strüngmann, German entrepreneurs, and named after their father Dr. Ernst Strüngmann. The ESI is under the scientific governance of the Max Planck Society. It is located in Frankfurt am Main in Hesse. ESI-directors are Scientific Members of the Max Planck Society.