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FIG 1. Time course of olivary hypertrophy. The data points indicate the presence or absence of hypertrophy based on MR findings as a function of time after onset of clinical symptoms. Note that there is a higher density of data points between 0.5 and 5 years for the hypertrophy present category, indicating a high likelihood of finding hypertrophy during this time frame. Also note the absence of hypertrophy both early and late in the course of the disease
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