1. UCL And Birkbeck; Institute of Structural and Molecular Biology; Malet Street London WC1E 7HX United Kingdom
2. Institute for Molecular Infection Biology, University of Würzburg; Josef-Schneider-Strasse 2, Haus D15 Würzburg 97080 Germany
3. London Centre for Nanotechnology; 17-19 Gordon Street London WC1H 0AH United Kingdom