1 Center for Neuroprosthetics and Brain Mind Institute, Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland.
2 Molecular and Cellular Neurobiotechnology, Institute for Bioengineering of Catalonia, Barcelona, Spain.
3 Department of Cell Biology, Physiology and Immunology, University of Barcelona, Barcelona, Spain.
4 Network Centre of Biomedical Research of Neurodegenerative Diseases (CIBERNED), Institute of Health Carlos III, Ministry of Economy and Competitiveness, Madrid, Spain.
5 Institute of Neuroscience, University of Barcelona, Barcelona, Spain.