The Hashimoto's Encephalopathy SREAT Alliance ("HESA") is a 501(c)(3) nonprofit organization formed in 2012. HESA is dedicated to collecting, archiving and sharing information regarding Hashimoto's Encephalopathy ("HE"), also known as Steroid Responsive Encephalopathy Associated with Thyroiditis ("SREAT") to educate patients, the public, and medical professionals about this poorly understood disease. HESA also raises funds to support scientific research into HE/SREAT, and collaborates with other organizations devoted to encephalitis and encephalopathy.