IL4 and asthma: Chinese patients with four SNPs, including IL4 (rs2243250C>T), IL13 (rs1800925C>T), IL4R (rs1805010G>A), and STAT6 (rs3224011T>C), show an association with a high-risk genotype for asthma vulnerability by elevating the expression levels of IL4, IL13, and STAT6 (108).