GABRG2 and Parkinson disease: Other biomarkers (APOE, NTRK2, SLCO1B3, SLC28A3, AQP10, SNCAIP, ANO2, CADM1, PTPRD, GPR32, GPR321, SQOR, SULT1C2, GABRG2, CYP4Z1, CDH13, and FANCF) were also related to the clinical characteristics of PD (e.g., cognition, motor, age at onset, etc.).