Relapses and disability accumulation in progressive multiple sclerosis.
Paz Soldán MM, Novotna M, Abou Zeid N, Kale N, Tutuncu M, Crusan DJ, Atkinson EJ, Siva A, Keegan BM, Pirko I, Pittock SJ, Lucchinetti CF, Weinshenker BG, Rodriguez M, Kantarci OH. Relapses and disability accumulation in progressive multiple sclerosis. Neurology. 2015 Jan 06; 84(1):81-8.