LILRB5 and Takayasu arteritis: In addition, the haplotype of the LILRB5-3 hybrid gene also lacks LILRA3. Since LILRA3 deletion is associated with Takayasu arteritis in the Japanese population (21), it is conceivable that the combination of the LILRB5-3 hybrid gene and the LILRA3 deletion may be useful for further classification of the pathogenesis of Takayasu arteritis.