MAPT and supranuclear palsy, progressive, 1: Because patients with PSP displayed high interindividual variability in receptor density alterations (see large SD in Fig. 1a and d), we subdivided the cohort on the basis of the clinical parameters presence of frontal presentation and severity of tau pathology in the examined regions, and we tested separately for data obtained from the caudate nucleus and area 24′ whether these factors were associated with receptor density alterations in patients with PSP.