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https://www.technologyreview.com/s/608073/gene-editing-companies-hit-back-at-paper-that-criticized-crispr/

Extract :

In separate letters sent to Nature Methods, scientists from Intellia Therapeutics and Editas Medicine criticized a report in the journal that claimed the gene-editing tool CRISPR had caused unexpected mutations in the genomes of mice and which cast a shadow over efforts to initiate human studies using the technique.

[…]

According to Intellia, however, the authors showed “disregard” for what’s already known about CRISPR. “It is clear the authors are not experts on the CRISPR Cas9, whole genome sequencing, nor basic genetics. Their claim of ‘unexpected mutations’ clearly demonstrates their lack of scientific acumen around this topic,” the company said.