Occupancy of in vivo [11C]-(+)-2H-naphth[1,2-b]-1,4-oxazin-9-ol, 3,4,4a,5,6,10b-hexahydro-4-propyl-([11C]PHNO) binding sites (OPHNO) in the baboon and human ventral striatum (VST) (a), globus pallidus (GP) (b), and substantia nigra (SN) (c) at increasing plasma GSK598809 concentrations (at the beginning of the scan), as revealed by positron emission tomography (PET) methodology (original values were partially already reported in Searle et al (2010)).