Publisher's Note: Spin waves and spatially anisotropic exchange interactions in the $S=2$ stripe antiferromagnet ${\mathrm{Rb}}_{0.8}{\mathrm{Fe}}_{1.5}{\mathrm{S}}_2$ [Phys. Rev. B 92, 041109(R) (2015)]

Meng Wang, P. Valdivia, Ming Yi, J. X. Chen, W. L. Zhang, R. A. Ewings, T. G. Perring, Yang Zhao, L. W. Harriger, J. W. Lynn, E. Bourret-Courchesne, Pengcheng Dai, D. H. Lee, D. X. Yao, and R. J. Birgeneau

Phys. Rev. B 92, 079901 – Published 6 August 2015