In vitro autoradiography of PD and non-PD postmortem brain tissue was performed using the previously published tritiated CSF1R radiotracer 4-cyano-N-(4(4-[3H]methylpiperazin-1-yl)-2-(4-methylpiperidin-1-yl)phenyl)-1H-pyrrole-2-carboxamide ([3H]JHU11761) (22). The gene discussed is CSF1R; the disease is Parkinson disease.