GBA1 and Parkinson disease: We also examined baseline BMP levels in three additional GBA1 sub-cohorts, though each had a small number of individuals: those associated with severe Gaucher disease, L483P (N = 8 with PD and N = 3 NMC), and a group of rare variants combined (IVS2+ 1 G > A, L29Afs18, T408M+ R159W, R502C; N = 6 with PD and N = 4 NMC) as well as the PD-specific common risk variant, E365K (N = 19 with PD and N = 5 NMC).