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Purpose: This study aimed to investigate long-term, radiation-induced changes in microvessel permeability, the profile of the vasoactive mediators endothelin and nitric oxide, and the response of specific cell systems in the irradiated spinal cord of rats.Methods and Materials: The thoracolumbar spinal cords of Fischer rats were irradiated to a dose of 15 Gy, and the rats were sacrificed at various...