According to clinical criteria, 12 individuals were diagnosed with SMA type 2 (one with 2 SMN2 and 10 with 3 SMN2 copies, one without information on the number of SMN2 copies), and 31 with SMA type 3 (five with 3 SMN2, 26 with 4 SMN2 copies). The gene discussed is SMN2; the disease is spinal muscular atrophy, type II.