in parkinson 's disease patients , the d2 densities were elevated in tissues from patients not receiving l-dopa ( 19.9 +/- 1.5 pmol/g in putamen and 14.8 +/- 1.2 pmol/g in striatum ) compared to the age-matched control values of 13.0 +/- 0.4 pmol/g and 12.6 +/- 0.3 pmol/g , respectively .
C0030567
parkinson 's disease
C0023570
l-dopa