Antibody to aquaporin 4 in the diagnosis of neuromyelitis optica. by Paul, F, Jarius, S, Aktas, O, Bluthner, M, Bauer, O, Appelhans, H, Franciotta, D, Bergamaschi, R, Littleton, E, Palace, J, Seelig, H, Hohlfeld, R, Vincent, A, Zipp, F