Scientific Reports 5: Article number: 9456; published online: 08 April 2015; updated: 10 May 2016

The original HTML version of this Article contained typographical errors in the spelling of the author Dirk Krüger which was incorrectly given as Krüger Krger. This has now been corrected.

Additionally, there was a typographical error in the Acknowledgements section:

“Christina Lachmann helped with bioinformatics.”

now reads:

“Christina Weißbecker helped with bioinformatics.”