Editors' Pick Epidemiology of neuromyelitis optica in the world: a systematic review and meta-analysis. Etemadifar M, Nasr Z, Khalili B, Taherioun M, Vosoughi R Mult Scler Int. 2015; 2015:174720. Epub 2015 Apr 20. PMID: 25973275. Abstract CommentRecommendBookmarkWatch