GAD1 and hereditary elliptocytosis: In the 1980s, these cases were reported in association with autoantibodies, and three clinical entities have been established so far, based on the kind of the associated antibodies (Abs): CA with Abs to glutamic acid decarboxylase (GAD), CA with Abs to thyroid tissue (cerebellar type of Hashimoto’s encephalopathy), and CA with Abs to gliadin (gluten ataxia).