Table 4.

Reference genes ranked in order of increasing expression stability in paired liver tissues*.

paired tissues A (n = 22)				Paired tissues B (n = 32)
geNorm	M value	NormFinder	Stability value	geNorm	M value	NormFinder	Stability value
B2M	0.799	B2M	0.149	B2M	0.826	UBC	0.207
HPRT1	0.658	HPRT1	0.105	HPRT1	0.816	SDHA	0.203
UBC	0.654	UBC	0.101	UBC	0.771	HPRT1	0.164
SDHA	0.598	GAPDH	0.068	SDHA	0.711	B2M	0.159
GAPDH	0.566	SDHA	0.052	GAPDH	0.692	GAPDH	0.145
HMBS	0.514	HMBS	0.021	HMBS	0.629	HMBS	0.084
HMBS-GAPDH	0.417	HMBS-SDHA	0.033	HMBS-SDHA	0.489	HMBS-B2M	0.079

Paired tissues A: paired tumoral and non-tumoral tissues left after the exclusion of RNA samples with relatively high amount of inhibitors; Paired tissues B: all paired tissues. *Increases from top to bottom.