1 Division of Nuclear Medicine and Molecular imaging, Department of Medical Imaging, Geneva University and Geneva University Hospitals, Geneva, Switzerland.
2 Nuclear Medicine Unit, IRCCS San Martino - IST, Department of Health Sciences, University of Genoa, Genoa, Italy.
3 Institute of Cognitive Sciences and Technologies, CNR, Rome, Italy. marco.pagani@istc.cnr.it.
4 Department of Nuclear Medicine, Karolinska Hospital, Stockholm, Sweden. marco.pagani@istc.cnr.it.