FGF18 and triple-A syndrome: The AAA incidence rates in the animal models were 83.3% (10/12), 83.3% (10/12), 91.7% (11/12), and 75% (9/12) in the AAA, AAA + FGF18, AAA + LV-Itgβ1, and AAA + FGF18 + LV-Itgβ1 groups, respectively.