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Expression stability values calculated by geNorm and NormFinder for the three genes expressed in similar levels between tumor and normal tissues
| Gene | geNorm | NormFinder |
| HMBS | 1.344 | 0.298 |
| HPRT1 | 1.049 | 0.356 |
| TBP | 0.736 | 0.164 |
| Best combination of two genes | TBP + HPRT1 = 0.87 | TBP + HPRT1 = 0.166 |
