Dataset from A Multicenter, Follow-Up Study to Assess Long-Term Electrophysiologic and Clinical Outcomes in Subjects Previously Enrolled in Study 215ON201

The primary objective of the study is to assess full-field visual evoked potential (FF-VEP)
latency in subjects who were enrolled in Study NCT01721161 2 years (+ up to 12 months) after
the last study visit. The secondary objective is to assess clinical progression and severity
of central nervous system (CNS) demyelinating disease in subjects who were enrolled in Study
NCT01721161 2 years (+ up to 12 months) after the last study visit. Intervention was
administered in the previous study. The participants, investigator and outcome assessors
remain blinded in this follow-up study.