EVOLUTION Correction for “Causes of natural variation in fitness: Evidence from studies of Drosophila populations,” by Brian Charlesworth, which appeared in issue 6, February 10, 2015, of Proc Natl Acad Sci USA (112:1662–1669; first published January 8, 2015; 10.1073/pnas.1423275112).
The authors note that on page 1666, right column, first full paragraph, line 6, “an estimate of of 0.044” should instead appear as “an estimate of over both classes of mutation of 0.0073.”
The authors also note that on page 1666, right column, fourth full paragraph, line 3, “although even this is likely to be a substantial underestimate” should instead appear as “although the overall value is likely to be somewhat less than 0.01.”