Fig. 3. Follow-up analysis of FVC% predicted and MIP:MEP ratio in the lumbar-onset ALS (L-ALS) patients. Decreased FVC% predicted was found on follow-up. Two patients showed a change in the MIP:MEP ratio to above or below 1. Three patients (60%) showed a constant MIP:MEP ratio above or below 1 from the first to the last examination.
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