As a result, we identified four genes from the module that were not among the initial set of seed genes but were found in the above GWAS study by Bipolar Disorder Working Group: RIMS1, ERBB2, STK4, and MAD1L1. These four genes have been previously shown to play functional roles in a number of neurological disorders [58,59,60]. Here, STK4 is linked to nervous system disorder.