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Expanded Disability Status Scale (EDSS) score over time: year 0 (at the cladribine induction treatment initiation), year 1 (at the end of cladribine induction treatment), year 5 (follow-up of 5 years), year 10 (follow-up of 10 years), year 15 (follow-up of 15 years), and year 20 (follow-up of 20 years). Data are presented as median (horizontal line), 25% interquartile range (box), range (whiskers), and means (middle cross).
