1. Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
2. Laboratory of Genetics, School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
3. Department of Life and Environmental Science, Polytechnic University of Marche, Ancona, Italy
4. Structural Biology Unit, CIC bioGUNE, Derio, Bizkaia, Spain