We found abnormally higher PINK1 (HC: 84.2 ± 15.0 vs. 76.0 ± 15.1 ng/mL; PD: 97.6 ± 17.8 vs. 80.6 ± 16.7 ng/mL, respectively) and Parkin (HC: 22.2 ± 3.68 vs. 17.7 ± 3.53 ng/mL; PD: 23.0 ± 3.72 vs. 20.1 ± 4.72 ng/mL, respectively) levels in the a‐Syn (+) subjects compared to a‐Syn (−) populations (Figure 5C–E and Table S5). Here, PRKN is linked to Parkinson disease.