Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands.|Institute for Theoretical Physics, Heidelberg University, Heidelberg, Germany.|Van Leeuwenhoek Centre for Advanced Microscopy, University of Amsterdam, Amsterdam, The Netherlands, Department for Molecular Biotechnology, University of Gent, Gent, Belgium.|Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands.|Institute for Theoretical Physics, Heidelberg University, Heidelberg, Germany.|Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands.