Patient Acceptable Symptomatic State and Minimal Clinically Important Difference of the Fatigue in Multiple Sclerosis (SeDiF_SEP)

Two-year patient follow-up is planned with data collection at 0, 12 and 24 months. In addition to data already collected as part of the establishment and monitoring of the ReLSEP registry, more specific data for this study will be collected at 0, 12 and 24 months by self-questionnaires sent to patients' homes.