Corpus callosum microstructural changes correlate with cognitive dysfunction in early stages of relapsing-remitting multiple sclerosis: axial and radial diffusivities approach - Rimkus, Carolina de Medeiros; Junqueira, Thiago de Faria; Lyra, Katarina Paz; Jackowski, Marcel J.; Machado, Melissa A. R.; Miotto, Eliane Correa; Callegaro, Dagoberto; Otaduy, Maria Concepción Garcia; Leite, Cláudia da Costa (Multiple sclerosis international, 2011)