Previous Article Next Article Table of Contents Nature, Vol.584, No.7821, E29-E33, 2020 DOI10.1038/s41586-020-2523-2 Export Citation Reply to: APP gene copy number changes reflect exogenous contamination Lee MH, Liu CS, Zhu YJ, Kaeser GE, Rivera R, Romanow WJ, Kihara Y, Chun J Please enable JavaScript to view the comments powered by Disqus.