Correction: Widespread evidence for horizontal transfer of transposable elements across Drosophila genomes

Correction It has been brought to our attention that there is an error in the estimated time of occurrence of horizontal transfers in the Drosophila genome in our article [1]. The twelfth paragraph of the Results and discussion section should read: The distributions of Ks values among the littlediverged TEs display a peak within the range 0.03-0.05 (Figure 3). If we assume a mutational clock of 0.011 substitutions per nucleotide per million years [46], this suggests that most HT has occurred over a broad period of time centered between 1.4 and 2.3 MYA, well after the split of the D. melanogaster and D. simulans lineages 5.4 +/1.1 MYA or the time of their most recent common ancestor with D. yakuba, 12.8 +/2.7 MYA [46].