1. University Clinic Würzburg and Rudolf Virchow Center, DFG Research Center for Experimental Biomedicine, University of Würzburg, Josef-Schneider-Strasse 2, 97080 Würzburg, Germany.
2. Department of Neurology, University Clinic, 97080 Würzburg, Germany.
3. Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, 6200 MD Maastricht, the Netherlands.
4. Max-Planck-Institute for Biochemistry, 82152 Martinsried, Germany.
5. Department of Pharmacology, Center for Developmental Genetics, Stony Brook University, Stony Brook, NY 11794–5140, USA.