1. Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, P.O.
Box 30001, Groningen 9713 GZ, The Netherlands
2. Central Research Laboratory, Hamamatsu Photonics KK, 5000 Hirakuchi, Hamakita, Hamamatsu 434-8601, Shizuoka, Japan
3. Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
4. Department of Pharmacy, University of Bari Aldo Moro, Bari 70125, Italy
5. Biofordrug, Spin-off Università degli Studi di Bari “A. Moro”, via Dante 99, Triggiano, Bari 70019, Italy