GBA1 and Parkinson disease: In addition, forty-three patients carried variants in GBA1, including T369M, which may lack disease-association in our population (n = 12); E326K (n = 22), which is classified as a PD risk variant; as well as N370S (n = 3), R329H (n = 3), S107L (n = 1), and L444P (n = 1), with one patient harboring both T369M and E326K.