Table 1.

Primer sequences used.

Gene	Forward primer	Reverse primer
CYP1A1	5′-CCAAGAGTCCACCCTTCCCAGCT-3′	5′-GAGGCCAGAAGAAACTCCGTGGC-3′
CYP1B1	5′-TGGATTTGGAGAACGTACCG-3′	5′-CCACGACCTGATCCAATTCT-3’
HPRT	5′-GTTCTGTGGCCATCTGCTTAG-3′	5′-GCCCAAAGGGAACTGATAGTC-3′