Acknowledgements
Supported by: IGA NT13576 from Ministry of Health, Czech Republic (LRK, MJ); LO1304 from Ministry of Education, Youth and Sports, Czech Republic (LRK); MSMT CR project CEITEC 2020 (LQ1601), project AZV MZCR 15-31834A and TACR TE02000058 (VN, TL, JC, SP). We thank Lenka Kruzova for routine FISH analysis.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.1080/10428194.2016.1187276.