Table 4. Frequency of compound-mutations among 142,417 neonates.

Mode of compound mutations	Cases counts	Frequency (%)
c.235delC heterozygous vs c.919-2A>G heterozygous	33	0.023
c.235delC heterozygous vs m.1494C>T homoplasmic	3	0.002
c.919-2A>G heterozygous vs m.1555A>G homoplasmic	1	0.0007