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Risk factors for multiple sclerosis: decreased vitamin D level and remote Epstein-Barr virus infection in the pre-clinical phase of multiple sclerosis

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  • Competing interests Dr Niino receives research support from Grants-in-Aid for Scientific Research from the Ministry of Health, Labor and Welfare of Japan and National Hospital Organization of Japan, and serves on a scientific advisory board for Biogen Idec. He has also received speaker honoraria from Biogen Idec, Bayer Schering Pharma, Asahi Kasei Kuraray Medical Co, Ltd, and Novartis Pharma.

  • Provenance and peer review Commissioned; internally peer reviewed.

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