1. Department of Nuclear Medicine, Erasmus MC, Rotterdam, The Netherlands
2. Department of Neurology, Erasmus MC, Rotterdam, The Netherlands
3. Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
4. Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Canada
5. The Gene Therapy Center, Division of Human Gene Therapy, Departments of Medicine, University of Alabama at Birmingham, Birmingham, AL