ATP7B and Mitochondrial myopathy: The remaining 29 newborns were found to carry biallelic or hemizygous mutations causing hearing loss and 4 disorders were not included in C-NBS (mitochondrial myopathy, Wilson’s disease (WD), purine disorder, and rickets) (Additional file 1: Table S5), 2 of them with biallelic [c.2333G > A/c.3532A > G] and homozygous [c.3859G > A/c.3859G > A] mutations of ATP7B gene were diagnosed with WD after followed up (Table 4).