In the Guangzhou cohort study, after adjusting for age and sex,two AHSG SNPs and one CYP4F3 SNP were found tobe associated with SARS susceptibility: rs2248690 (adjusted odds ratio[AOR] 2.42; 95% confidence interval [CI] 1.30-4.51);rs4917 (AOR 1.84; 95% CI 1.02-3.34); and rs3794987 (AOR 2.01; 95%CI 1.10–3.68). Here, CYP4F3 is linked to severe acute respiratory syndrome.