This article was originally published online with an incomplete funding number in the Acknowledgments. The sentence should have read: This work has been partially supported by the National Science Centre (grant decision No. DEC-2011/03/N/ST3/02950), the National Centre for Research and Development Grants No. IT13426, INNOTECH157829, European Union within and IAPP project SINOPLE Grant No. 230765 and European Union funds by the European Social Fund.

All online versions were corrected 16 April 2014.