1. Division of Nuclear Medicine and Department of Imaging and pathology, University Hospitals Leuven and KU Leuven, Leuven, Belgium,
2. ALS Center, ‘Rita Levi Montalcini’ Department of Neuroscience, University of Torino, Torino, Italy,
3. Neuroscience Institute of Torino, Torino, Italy,
4. Positron Emission Tomography Center IRMET S.p.A, Turin, Italy,
5. Department of Neurology, University Hospitals Leuven and Laboratory of Neurobiology, Center for Brain & Disease Research KU Leuven and VIB, Leuven, Belgium,
6. Department of Nuclear Medicine, Karolinska Hospital, Stockholm, Sweden, and
7. Institute of Cognitive Sciences and Technologies, CNR, Rome, Italy