Geographical variations in sex ratio trends over time in multiple sclerosis. oleh Maria Trojano, Guglielmo Lucchese, Giusi Graziano, Bruce V Taylor, Steve Simpson, Vito Lepore, Francois Grand'maison, Pierre Duquette, Guillermo Izquierdo, Pierre Grammond, Maria Pia Amato, Roberto Bergamaschi, Giorgio Giuliani, Cavit Boz, Raymond Hupperts, Vincent Van Pesch, Jeannette Lechner-Scott, Edgardo Cristiano, Marcela Fiol, Celia Oreja-Guevara, Maria Laura Saladino, Freek Verheul, Mark Slee, Damiano Paolicelli, Carla Tortorella, Mariangela D'Onghia, Pietro Iaffaldano, Vita Direnzo, Helmut Butzkueven, MSBase Study Group and the New Zealand MS Prevalence Study Group