CD68 and chronic kidney disease: The surface area of CD68+ positive macrophages in the explanted grafts of both Sham and CKD animals increased toward week 8 (Sham 2 weeks 2.6 ± 0.6%, 8 weeks 9.4 ± 1.7%; p:0.005—CKD 2 weeks 4.8 ± 1.6%vs 8 weeks 8.3 ± 1.3%; p:0.48) [Figs. 3(a) and 3(c)].