Cortical lesions in primary progressive multiple sclerosis: A 2-year longitudinal MR study
M. Calabrese,
M.A. Rocca,
M. Atzori,
I. Mattisi,
V. Bernardi,
A. Favaretto,
L. Barachino,
C. Romualdi,
L. Rinaldi,
P. Perini,
P. Gallo,
M. Filippi
January 2009