IL4 and chronic kidney disease: In stratified analyses based on ethnicity, <i>TGF-β1</i> rs1800469 was associated with CKD susceptibility in Asians and Caucasians, and there was an association of <i>TGF-β1</i> rs1800470 and <i>IL-4</i> rs8179190 with CKD in Asians.