15 ) The result showed a trend towards Japanese cases featuring greater involvement of the OPC region, while British cases tended to show that the basal ganglia were more severely affected than the OPC region (Fig. 2 ). 15 ) They concluded that the OPC-predominant pathology was significantly more frequent in the Japanese series (40%) than in the British series (17%) (Table 2 ). 6 ) Discussion We reviewed articles detailing the natural history or epidemiology of MSA to determine the relative frequencies of MSA-P and MSA-C in various populations.
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Multiple system atrophy: clinicopathological characteristics in Japanese patients.
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