Tyrosine hydroxylase (TH) immunostaining, which is a classic staining method for visualization of dopaminergic neurons, clearly showed that much fewer dopaminergic neurons were stained in the monkey with Parkinsonism compared with those in the death-condition-matched control (DCMC, ID: #071809) under lower resolution images (Fig. 1G and H). Here, TH is linked to Parkinson disease.