LRRK2 and Parkinson disease: More carefully differentiating the different subtypes of PD patients, GDCA was significantly higher and TCA was significantly lower in leucine-rich repeat kinase 2 (LRRK2) PD patients, GCDCA was significantly lower in sporadic PD (sPD) patients, and TCA was significantly higher in LRRK2 PD compared to sPD patients [109].