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Correction to: The ISME Journal (2015) 9, 2304–2314; doi:10.1038/ismej.2015.98; published online 22 September 2015
Updated online 24 January 2017: This article was originally published under a CC BY-NC-ND 4.0 license, but has now been made available under a CC-BY 4.0 license. The PDF and HTML versions of the paper have been modified accordingly.
