Similarly, we identified two heterozygous carriers of pathogenic GBA variants, and although GBA heterozygotes will not develop Gaucher disease—an autosomal recessive lysosomal storage disease—they are at increased risk for developing Parkinson's disease (Tayebi et al. 2003; Halperin et al. 2006; Alcalay et al. 2014). Here, GBA1 is linked to Gaucher disease.