Fig. 4From: Stratification of disease progression in a broad spectrum of degenerative cerebellar ataxias with a clustering method using MRI-based atrophy rates of brain structuresCategorization of patients by cluster analysis. Based on the annual atrophy rates of corpus callosum (Adx) and cerebellum (Vdx), patients were classified into three clusters (â—‹: cluster 1, â–²: cluster 2, â–¡: cluster 3)Back to article page