The article Eculizumab: A Review in Neuromyelitis Optica Spectrum Disorder, written by James E. Frampton, was originally published electronically in SpringerLink on 7 April 2020 without Open Access. After publication Alexion Pharmaceuticals, Inc., requested that the article be Open Choice to make the article an open access publication. Post-publication open access was funded by Alexion Pharmaceuticals, Inc.