Interesting results from North Arab-Berber population comparing LRRK2, PINK1, and genetically undefined PD

This recent paper compares clinical phenotypes in PD patients with LRRK2 mutations, PINK1 mutations, or genetically undefined familial PD.  The authors identify some clinical differences between the groups suggesting an associationg between specific genetic causes of PD and clinical phenotypes.  It is of interest to determine whether these same correlations are found in other populations.