1. Department of Radiation Medicine Engineering, Shahid Beheshti University, Tehran, Iran.
2. Research Center for Nuclear Medicine, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
3. Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland.
4. Geneva Neuroscience Center, Geneva University, Geneva, Switzerland.
5. Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.