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Risk of natalizumab-associated progressive multifocal leukoencephalopathy in patients with multiple sclerosis: a retrospective analysis of data from four clinical studies

Systemic DiseasesDisease ProgressionAutoimmune DiseaseMedicineNeuroepidemiologyNeurological DisorderClinical EpidemiologyClinical StudiesRetrospective AnalysisNeurologyMultiple SclerosisPublic HealthNeuropathologyNeuroimmunologyEpidemiology