1 Wellcome Trust and MRC Cambridge Stem Cell Institute, Department of Clinical Neurosciences, Anne McLaren Laboratory, University of Cambridge, Cambridge, CB2 0SZ, UK.
2 Department of Neurogenetics, Max Planck Institute for Experimental Medicine, 37075, Goettingen, Germany.
3 Centre for Neuroregeneration, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK.
4 Department of Chemistry, University of Natural Resource and Life Sciences, Muthgasse 18, 1190, Vienna, Austria.
5 Frankfurt Institute for Molecular Life Sciences and Institute of Cell Biology and Neuroscience, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt am Main, Germany.
6 Department of Clinical Neuroscience, Anne McLaren Laboratory for Regenerative Medicine, University of Cambridge, Cambridge, UK.
7 Department of Pediatrics, Medical University Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
8 Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 4, 1090, Vienna, Austria.
9 Cambridge Centre for Proteomics, Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QW, UK.
10 Wellcome Trust and MRC Cambridge Stem Cell Institute, Department of Clinical Neurosciences, Anne McLaren Laboratory, University of Cambridge, Cambridge, CB2 0SZ, UK. mrk25@cam.ac.uk.
11 Department of Neurogenetics, Max Planck Institute for Experimental Medicine, 37075, Goettingen, Germany. mrk25@cam.ac.uk.