Nat. Methods 14, 395–398 (2017); published online 13 February 2017; corrected after print 21 June 2017

The doi, link, and publication date of the Seq-Well protocol in the Protocol Exchange were updated; the doi and link have been corrected from http://doi.dx.org/10.1038/protex.2017.006 to http://dx.doi.org/10.1038/protex.2017.006a, and the date has been changed from 2016 to 2017. The grant number U24 AI11862 was incorrect; it has been corrected to U24 AI118672. These errors have been updated in the HTML and PDF versions of the article.