During extensive revisions of this BCA, we inadvertently omitted a citation by Takaho A. Endo that used variant calls from RNA-seq data to conclude that the purported Fgf4-induced stem cells (FI-SCs) described in Obokata et al.1 constituted a mixture of trophoblastic and embryonic stem cells2. Our analysis, performed independently, reached similar conclusions. We regret this oversight.
Obokata, H. et al. Bidirectional potential in reprogrammed cells with acquired pluripotency. Nature 505, 676–680 (2014)
Endo, T. A. Quality control method for RNA-seq using single nucleotide polymorphism allele frequency. Genes Cells 19, 821–829 (2014)
The online version of the original article can be found at 10.1038/nature15513