The DRD2 gene was selectively expressed in multiple prioritized pathogenic tissues of schizophrenia (including brain-anterior cingulate cortex, brain-cortex, brain-putamen (basal ganglia), and brain-spinal cord), and there were 100 papers co-mentioning the gene and schizophrenia in their titles or abstracts in PubMed database (see details in Additional file 2: Table S9). The gene discussed is DRD2; the disease is schizophrenia.