A GBA1 splice-site variant (rs104886460-G/A; c.115+1G>A; ClinVar ID: 93445) was identified in the WGS data of family A. Segregation testing of this variant in family A revealed four PD subjects as heterozygous carriers of c.115+1G>A and in addition three asymptomatic carriers (Fig. 1A, symbols marked with thick lines; IV:6, V:4, and V:5). Here, GBA1 is linked to Parkinson disease.