Correction to: The ISME Journal advance online publication, 16 December 2014; doi:10.1038/ismej.2014.234

Since the publication of this article, the authors have identified an error concerning the acknowledgements, namely that ‘Cystic Fibrosis Research Inc.’ was incorrectly listed as ‘Cystic Fibrosis Research Foundation’.

The error has now been rectified, and the correct paper now appears in this issue. The html and online pdf versions have also been rectified, and now carry the correct paper.

The authors would like to apologise for any inconvenience this may have caused.