SNCA and Parkinson disease: AAO data were available for 1,037 monogenic and GBA1-related PD participants (PRKN: n=8, PINK1: n=15, PARK7: n=0, LRRK2: n=208, SNCA: n=1, VPS35: n=3, GBA1: n=802), of which 927 also had FH data.