1. Division of Bioanalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
2. Centre for Analytical Sciences Amsterdam, 1098 XH Amsterdam, The Netherlands
3. Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
4. Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, U.K.