SLC6A3 and Parkinson disease: In comparison to HC, patients showed reduced DAT binding values in the putamen (PD, right median: 2.19; right range: 1.2–3.51; left median: 2.63, left range: 1.41–3.4; HC, right median: 4.94, right range: 3.07–5.71; left median: 4.94, left range: 2.96–5.71; p<0.01 all) and caudate nucleus (PD, right median: 4.06; right range: 2.74–5.49; left median: 4.17, left range: 2.3–4.94; HC, right median 5.16, right range: 3.18–6.48; left median: 5.05, left range: 3.07–6.7; p<0.05 all) thus further supporting the clinical diagnosis of PD.