Eculizumab in aquaporin-4-positive neuromyelitis optica spectrum disorder. by Pittock, S, Berthele, A, Fujihara, K, Kim, H, Levy, M, Palace, J, Nakashima, I, Terzi, M, Totolyan, N, Viswanathan, S, Wang, K, Pace, A, Fujita, K, Armstrong, R, Wingerchuk, D