Scientific Reports 6: Article number: 25609; published online: 12 May 2016; updated: 12 August 2016.

In this Article, the Data resources have been omitted from the Methods section. It should read:

“All data used in the preparation of this paper are available from the University of Bristol’s research data repository, and can be accessed using the DOI 10.5523/bris.rz5m2a3q61851txlxs6eecuhx”.