GBA1 and Parkinson disease: Though the BioFIND cohort was purposely designed to reduce the chances of including genetic forms of PD, common glucocerebrosidase (GBA) and leucine repeat‐rich kinase 2 (LRRK2) variants were present in a few PD patients and HCs without PD.25 Based on published studies, we hypothesized that GBA mutations may increase α‐synuclein pathology whereas some LRRK2 mutations may lack α‐synuclein pathology.26, 27 We had 7 PD and 2 HC subjects with pathogenic GBA variants, and 1 PD and 1 HC subject with the LRRK2 G2019S mutation.