That study showed that five genes were included in all panels (SNCA, PRKN, PINK1, PARK7 (DJ1), and LRRK2), while VPS35 and GBA were only variably included, and that the differences between panels were mainly the result of the variable inclusion of genes associated with atypical parkinsonism and dystonia disorders, or genes with an uncertain association with PD [139]. This evidence concerns the gene LRRK2 and Parkinson disease.