Commensal Microbe-Derived Butyrate Induces the Differentiation of Colonic Regulatory T Cells.

Nature 504, 446–450 (2013); doi:10.1038/nature12721 In Fig. 1d of this Letter, the vertical label of the upper right panel should be “Neuropilin-1+ Foxp3+ (%)” instead of “Neuropilin-1−/Foxp3+ (%)”; this error has been corrected in the online versions of the paper.