Pregnancy decision-making in women with multiple sclerosis treated with natalizumab: I: Fetal risks.

Portaccio E, Annovazzi P, Ghezzi A, Zaffaroni M, Moiola L, Martinelli V, Lanzillo R, Brescia Morra V, Rinaldi F, Gallo P, Tortorella C, Paolicelli D, Pozzilli C, De Giglio L, Cavalla P, Cocco E, Marrosu MG, Patti F, Solaro C, Bellantonio P, Uccelli A, Laroni A, Pastò L, Giannini M, Trojano M, Comi G, Amato MP; MS Study Group of the Italian Neurological Society.