Corrigendum: Induction of Robust B Cell Responses After Influenza mRNA Vaccination Is Accompanied by Circulating Hemagglutinin-Specific ICOS+ PD-1+ CXCR3+ T Follicular Helper Cells - Lindgren, Gustaf; Ols, Sebastian; Liang, Frank; Thompson, Elizabeth A.; Lin, Ang; Hellgren, Fredrika; Bahl, Kapil; John, Shinu; Yuzhakov, Olga; Hassett, Kimberly J.; Brito, Luis A.; Salter, Hugh; et al. (Frontiers in Immunology, 2019)