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In the key of Figure 4F on page 1546, the gray label should represent “BCL11A+HBG-KO,” the green label should represent “HBG only KO,” the blue label should represent “BCL11A only KO,” and the red label should represent “not edited.” The corrected Figure 4F is shown below. The publisher apologizes for the errors, which have been corrected in the online version of the article.