PT - JOURNAL ARTICLE AU - Masaaki Niino TI - Risk factors for multiple sclerosis: decreased vitamin D level and remote Epstein-Barr virus infection in the pre-clinical phase of multiple sclerosis AID - 10.1136/jnnp-2012-303245 DP - 2012 Dec 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 1135--1135 VI - 83 IP - 12 4099 - http://jnnp.bmj.com/content/83/12/1135.short 4100 - http://jnnp.bmj.com/content/83/12/1135.full SO - J Neurol Neurosurg Psychiatry2012 Dec 01; 83