Nature 535, 294–298 (2016); doi:https://doi.org/10.1038/nature18614

In the Author Information section of this Letter, LT571435 from the SRA was provided as the accession number for the PacBio whole-genome sequencing data. Immediately after publication, we noted that LT571435 is instead the GenBank entry for the assembled genomic sequence of the cloche locus and this information is now included in the legend of Extended Data Fig. 2. The correct accession number for the PacBio whole-genome sequencing data, available from the European Nucleotide Archive, is PRJEB13442. The original Letter has been corrected online.