Evaluation of serum levels of chemokines during interferon-'beta' treatment in multiple sclerosis patients: A 1-year, observational cohort study - Comini-Frota, Elizabeth R.; Teixeira, Antonio L.; Angelo, Janaína P. A.; Andrade, Marcus V.; Brum, Doralina G.; Kaimen-Maciel, Damacio Ramon; Foss, Norma Tiraboschi; Donadi, Eduardo Antonio (CNS Drugs, 2011)