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LSM changes in MSWS-12 score over 24 weeks in the modified intention-to-treat sample. Negative change indicates improvement. Multiple imputation was used for missing post-baseline data except for during follow-up where observed data were used. Error bars indicate SE. DB double-blind, LSM least squares mean, MSWS-12 12-item Multiple Sclerosis Walking Scale, PR prolonged-release, SE standard error
