GAD1 and Wilson disease: Of course, treatable conditions such as immune-mediated ataxias (gluten-related ataxia, anti-GAD-antibodies-associated ataxia, systemic lupus erythematosus, Sjögren’s syndrome) [62, 63], or metal storage disorders such as Wilson’s disease [64], which may have an insidious onset, should be ruled out in the early stages of the diagnostic process.