Correction to: Nature Genetics https://doi.org/10.1038/s41588-018-0242-5, published online 8 October 2018.

In the version of this article originally published, the text was incorrect in the first paragraph of the ‘Remaining challenges’ section. The first two sentences appeared as “Even though this current study substantially increases the number of loci associated with T2D, only approximately 18% of the genetic component of T2D risk is explained by the total complement of genetic variants uncovered genome wide in Mahajan et al.6. Interestingly, only a small proportion of that heritability was explained by low-frequency or rare variants (~1.1%), thus potentially indicating that many more of these variants still remain to be characterized in even larger sample sizes.” However, they should have read “Even though this current study substantially increases the number of loci associated with T2D, only a proportion of the genetic component of T2D risk is explained by the total complement of genetic variants uncovered genome wide in Mahajan et al.6. Interestingly, only a relatively small proportion of that heritability was explained by low-frequency or rare variants, thus potentially indicating that many more of these variants still remain to be characterized in even larger sample sizes.” The text has been corrected in the HTML and PDF versions of the paper.