Nat. Protoc. 8, 1100–1113 (2013); doi:10.1038/nprot.2013.066; published online 16 May 2013; corrected after print 19 August 2015

In the version of this article initially published, a component (40 μl of 50 mg ml−1 BSA) was erroneously omitted from the 'Hybridization solution' recipe in the Reagent Setup section. The error has been corrected in the HTML and PDF versions of the article.