1 1 Department of Neurology, University Hospitals Leuven, University of Leuven, Leuven, Belgium.
2 2 Division of Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, University Hospitals Leuven, University of Leuven, Leuven, Belgium.
3 1 Department of Neurology, University Hospitals Leuven, University of Leuven, Leuven, Belgium wim.vandenberghe@uzleuven.be.