Schindlbeck et al. applied graph theory methods to investigate the genotype effects on the organization of PD-related networks in N = 12 GBA1-PDs, N = 14 LRRK2-PDs, N = 14 sporadic PDs (sPDs), and N = 14 healthy controls using FDG-PET. The gene discussed is GBA1; the disease is Parkinson disease.