| Gene | Sequence | Amplicon |
| GSTM1 | R-5’-GAACTCCCTGAAAAGCTAAAGC-3’ F-5’-GTTGGGCTCAAATATACGGTGG-3’ | 215 bp |
| GSTT1 | F-5’-TCACCGGATCATGGCCAGCA-3’ R-5’-TTCCTTACTGGTCCTCACATCTC-3’ | 480 bp |
| CYP1A1 | F-5’-GAACTGCCACTTCAGCTGTCT-3’ R-5’-CAGCTGCATTTGGAAGTGCTC-3’ | 312 bp |
| GSTP1b | F-5’-ACCCCAGGGCTCTATGGGAA-3’ R-5’-TGAGGGCACAAGAAGCCCCT-3’ | 176 bp |
| GSTP1c | F-5-’TGGCAGCTGAAGTGGACAGGATT-3’ R-5’-ATGGCTCACACCTGTGTCCATCT-3’ | 332 bp |