Persistence on therapy and propensity matched outcome comparison of two subcutaneous interferon beta 1a dosages for multiple sclerosis. oleh Tomas Kalincik, Timothy Spelman, Maria Trojano, Pierre Duquette, Guillermo Izquierdo, Pierre Grammond, Alessandra Lugaresi, Raymond Hupperts, Edgardo Cristiano, Vincent Van Pesch, Francois Grand'maison, Daniele La Spitaleri, Maria Edite Rio, Sholmo Flechter, Celia Oreja-Guevara, Giorgio Giuliani, Aldo Savino, Maria Pia Amato, Thor Petersen, Ricardo Fernandez-Bolanos, Roberto Bergamaschi, Gerardo Iuliano, Cavit Boz, Jeannette Lechner-Scott, Norma Deri, Orla Gray, Freek Verheul, Marcela Fiol, Michael Barnett, Erik van Munster, Vetere Santiago, Fraser Moore, Mark Slee, Maria Laura Saladino, Raed Alroughani, Cameron Shaw, Krisztian Kasa, Tatjana Petkovska-Boskova, Leontien den Braber-Moerland, Joab Chapman, Eli Skromne, Joseph Herbert, Dieter Poehlau, Merrilee Needham, Elizabeth Alejandra Bacile Bacile, Walter Oleschko Arruda, Mark Paine, Bhim Singhal, Steve Vucic, Jose Antonio Cabrera-Gomez, Helmut Butzkueven, MSBase Study Group