Editors' Pick Aquaporin-4 antibody-negative neuromyelitis optica: Distinct assay sensitivity-dependent entity. Marignier R, Bernard-Valnet R, Giraudon P, Collongues N, Papeix C, Zéphir H, Cavillon G, Rogemond V, Casey R, Frangoulis B, et al. Neurology. 2013 May 8. PMID: 23658379. Abstract CommentRecommendBookmarkWatch