We previously performed a cellular GWAS on CXCL10 levels in culture supernatants after C. trachomatis (LGV-L2 RifR pGFP::SW2) infection of 528 LCLs from 4 populations, ESN (Esan in Nigeria), GWD (Gambian in Western Divisions in the Gambia), KHV (Kinh in Ho Chi Minh City, Vietnam), IBS (Iberian in Spain), in parent–offspring trios. This evidence concerns the gene CXCL10 and irritable bowel syndrome.