Table 1. Primer sequences used for amplification of target SNP loci.

Gene	Location	SNP	Primer sequence
IL-6 -174 G>C	7p21	rs1800795	Forward: 5′-GCCTCAATGACGACCTAAGC-3′;
			Reverse: 5′-GATTGTGCAATGTGACGTCCT-3′
IL-8 -251 T>A	4q13-21	rs4073	Forward: 5′-CCCAAGCTTGTGTGCTCTGCTGT-3′;
			Reverse: 5′-GATTCTGCTCTTATGCCTCA-3′
MMP-13 -77G>A	11q22	rs2252070	Forward: 5′-GAGACCCTGCTGAAACAAGAG-3′;
			Reverse: 5′-GCCAGGACCCCTGGATGCATC-3′