Cortical Pathology in RRMS: Taking a Cue from Four Sisters. Calabrese M, Seppi D, Cocco E, Poretto V, Rinaldi F, Perini P, Gallo P Mult Scler Int. 2012; 2012:760254. Epub 2012 Sep 27. PMID: 23056945. Abstract CommentRecommendBookmarkWatch