, the copy number of exon 0 of *SMN0* gene was 0, 0, and 0 copies, accounting for 00.0% (00/00), 00.0% (00/00), and 00.0% (0/00) of patients, respectively. The copy number of exon 0 of *NAIP* gene was 0, 0, and 0 copies, accounting for 00.0% (0/00), 00.0% (00/00), and 00.0% (00/00) of patients, respectively. The a