GMPPB and gastroesophageal reflux disease: In the Cerebellar Hemisphere, Cerebellum, and Cortex/Nucleus accumbens, enriched for SI and GERD, GMPPB, RNF123, and RBM6 were identified as potential functional genes, while SUOX was identified in the Caudate nucleus, Cerebellum, and Cortex, enriched for NS and GERD.