Table 2. Characteristic of studied polymorphisms.

Gene	rs number	Polymorphis	Localization	Minor allele freqency
TGFA	rs2166975	g.70677994G>A	Exon 5	A = 0.256
TGFB	rs1800469	g.41354391A>G	5′ of TGFB gene	A = 0.312
IRF1	rs2070729	g.132484229C>A	Intron 9	A = 0.465
IKBKB	rs5029748	g.42140549G>T	Intron 2	T = 0.259
PTGS2	rs5275	g.186643058A>G	3′ UTR of PTGS2 gene	G = 0.310
	rs4648308	g.186640617C>T	3′ of PTGS2 gene	T = 0.142