GBA1 and Parkinson disease: All four PD patients (IV:1, IV:4, IV:5, and V:1) of family A were heterozygous carriers for the DNAJB6; p.T193A and GBA1; c.115+1G>A variants whereas the three non-penetrant carriers of GBA1; c.115+1G>A in family A (IV:6, V:4, and V:5) lacked this concurrence.