1. Department of Neurology Clínica Universidad de Navarra, University of Navarra Pamplona Spain
2. IdiSNA (Navarra Institute for Health Research) Pamplona Spain
3. Department of Neurology University Medical Center Groningen Groningen the Netherlands
4. Department of Nuclear Medicine and Molecular Imaging University Medical Center Groningen Groningen the Netherlands
5. NeuroImaging Center University Medical Center Groningen Groningen the Netherlands
6. Institute of Cognitive Sciences and Technologies, CNR Rome Italy
7. Department of Medical Physics Clínica Universidad de Navarra Pamplona Spain
8. Department of Nuclear Medicine and Molecular Imaging Clínica Universidad de Navarra, University of Navarra Pamplona Spain