TY - STAND AU - M. Hernan AU - S. Jick AU - M. Olek AU - H. Jick BT - Neurology M1 - 5 PY - 2004 SP - 838 EP - 42 T2 - Neurology TI - Recombinant hepatitis B vaccine and the risk of multiple sclerosis: a prospective study VL - 63 SN - 0028-3878 ER -