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MMP and TIMP genotyping were done by PCR-RFLP and visualized by electrophoresis on 4% agarose gel. The listed genotype patterns were (A) for MMP-3 -1612 as 5A5A or 6A6A; (B) for MMP-7 -181 as AA, AG, or GG; (C) for MMP-9 exon 6 as AA, AG, or GG; (D) for TIMP-1 372; as CC, TC, or TT; and (E) for TIMP-2 -418 as CG or GG.
