SMN1 and limb-girdle muscular dystrophy: The combined USNDR and MOVR data hub has 3,880 participants living with: ALS (n = 1,787), DMD (n = 1,107), SMA (n = 544), BMD (n = 237), LGMD (n = 109), FSHD (n = 80), and Pompe (n = 16) (Fig. 2B).