Scientific Reports 3, Article number: 2056 (2013); Published: 24 June 2013; Updated: 8 January 2014

The Acknowledgements section in this Article is incomplete; it should also contain the following statement:

“We would also like to thank Dr. Chiara Daraio of ETZ Zurich and Dr. Jordan R. Raney of Baylor University, Waco for discussion and development of the idea and US Army Research Office (under ICB contract) for partial financial support.”