1. Department of Biomedical Sciences of Cells & Systems, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
2. Center for Molecular Biology of Heidelberg University (ZMBH), and German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Heidelberg, Germany
3. Molecular Neurobiology, Department of Experimental Medical Science, Lund, Sweden
4. Institute Francois Jacob (MIRCen), CEA and Laboratory of Neurodegenerative Diseases, CNRS, Fontenay-Aux-Roses Cedex, France