Table 2. Primary information for ICOS rs4404254 T>C, rs10932029 T>C, CD28 rs3116496 T>C and CD80 rs7628626 C>A SNPs.

Genotyped SNPs	Chromosome	Chr. Pos. (NCBI Build 38)	Region	MAF1 for Chinese in database	MAF in our controls (n=923)	P-value for HWE2 test in our controls	Genotyping method	Genotyping value (%)
ICOS rs10932029 T>C	2	203937045	Intron	0.08	0.09	0.962	SNPscan	99.27
ICOS rs4404254 T>C	2	203960563	3′UTR	0.13	0.17	0.442	SNPscan	99.27
CD28 rs3116496 T>C	2	203729789	Intron	0.10	0.10	0.821	SNPscan	99.27
CD80 rs7628626 C>A	3	119525574	3′UTR	0.12	0.12	0.948	SNPscan	99.27

¹MAF, minor allele frequency.

²HWE, Hardy–Weinberg equilibrium.