Of the 93 genes in the PD-associated network (Supplementary Table 5), ten genes (FAM47E, PCGF3, CTSB, SH3GL2, WNT3, ITGA8, IP6K2, P4HTM, BIN3, and AREL1) were found to overlap with the set of 300 suggestive PD-risk genes. Here, CTSB is linked to Parkinson disease.