1. Wellcome/Cancer Research UK Gurdon Institute, Henry Wellcome Building of Cancer and Developmental Biology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, U.K.
2. Faculty of Medicine, University of Vilnius, M. K. Čiurlionio g. 21, LT-03101 Vilnius, Lithuania
3. BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, Max Planck Center for Complex Fluid Dynamics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
4. Center for Physical Sciences and Technology, Savanoriu 231, LT-02300 Vilnius, Lithuania