HESA, Hashimoto's Encephalopathy/SREAT & Seronegative Autoimmune Encephalitis Alliance, is a 501(c)(3) non-profit organization established to spread awareness and increase understanding of Hashimoto’s Encephalopathy and Seronegative Autoimmune Encephalitis while supporting those affected by HE/SREAT and SAE. Information about the alliance is available at hesaonline.info