In Fig. 3A of the Research Article “Follistatin gene delivery enhances muscle growth and strength in nonhuman primates” by Kota et al., the ELISpot data for the MCK promoter were erroneously duplicated as the data for the CMV promoter. The figure has been revised to illustrate the correct ELISpot data for the CMV promoter. This discrepancy did not affect the conclusions of the paper.