ABCG2 and narcolepsy: By inputting four candidate proteins from PWAS and six candidate genes from TWAS into the IEU Open GWAS project website, we matched each of them with traits related to brain function and cranial nerves, such as ABCG2 for narcolepsy (p = 7.90 × 10−5), for volume Left-Cerebellum-Cortex (p = 5.37 × 10−5) and for volume Right-Thalamus-Proper (p = 4.79 × 10−5), CPNE1 for cognitive performance (p = 1.57 × 10−4), for intelligence (p = 1.10 × 10−4) and for mood swings (p = 2.70 × 10−4).