CCR5 and triple-A syndrome: On the contrary, the incidences of AAA development in both Ccl3−/− and Ccr5−/− mice were significantly higher, compared with WT ones (64.3%, 9 out of 14 in Ccl3−/− mice; 66.7%, 8 out of 12 in Ccr5−/− mice) (Fig. 9d).