Table 3. Candidate reference genes ranked according to NormFinder.

In this analysis, genes ranked 1–4 were deemed highly stable, whereas genes ranked 8–9 were deemed highly unstable.

Ranking	Gene	Stability value
1	ACTB	0.083
2	HPRT1	0.092
3	PSMB6	0.094
4	TUBA1B	0.107
5	PPMM1	0.175
6	YWHAZ	0.186
7	SDHA	0.209
8	B2M	0.730
9	GAPDH	0.845