Table 1.

List of primers used in RT-PCR

Gene product	Primer set (forward; reverse)
EGFR	5′GGGGAATTCGCGATGCGACCCTCCGGG 3′; 5′GGGAAGCTTTCCGTTACACACTTTGCG 3′
erbB2	5′CCCACGTCCGTAGAAAGGTA 3′; 5′TGAACAATACCACCCCTGTC 3′
erbB3	5′GGTGCTGGGCTTGCTTTT 3′; 5′CGTGGCTGGAGTTGGTGTTA 3′
erbB4	5′TGTGAGAAGATGGAAGATGGC 3′; 5′GTTGTGGTAAAGTGGAATGGC 3′
18S	5′AAACGGCTACCACATCCAAG 3′; 5′CCTCCAATGGATCCTCGTTA 3′