1. Department of Biomedicine, Faculty of Medicine, Universitat de Barcelona, Barcelona, Catalonia, Spain
2. Institut de Neurociències, Universitat de Barcelona, Barcelona, Catalonia, Spain
3. Department of Molecular Neurobiology, Max Planck Institute of Experimental Medicine, Göttingen, Germany
4. Department of Biology, Pharmacology and Experimental Therapeutics, Boston University, Boston, Massachusetts, United States of America
5. IDIBAPS-Institut d'Investigacions Biomèdiques August Pi i Sunyer, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Catalonia, Spain