SLC6A3 and Parkinson disease: The patterns of striatal DAT availability were compatible between two groups (Colloby et al., 2004; Marquie et al., 2014; Gomperts et al., 2016; Pilotto et al., 2019), whereas others reported lower caudate DAT availability in DLB patients and greater asymmetricity or antero-posterior gradient of DAT availability in PD patients (Ransmayr et al., 2001; O'Brien et al., 2004; Walker et al., 2004).