Plasma Exchange for Steroid-Refractory Relapses in Multiple Sclerosis: An Observational, MRI Pilot Study. Meca-Lallana JE, Hernández-Clares R, León-Hernández A, Genovés Aleixandre A, Cacho Pérez M, Martín-Fernández JJ Clin Ther. 2013 Mar 26. PMID: 23541130. Abstract CommentRecommendBookmarkWatch