(p = 1.000) (Table 4) Pairwise comparison of mean (SD) difference of serum ACE level between AS and BD was −2.123 (2.894), between AS and presumed latent TB was −3.141 (3.038), between AS and presumed latent syphilis was −1.086 (5.656), between BD and presumed latent TB was −1.018 (3.149), between BD and presumed latent syphilis was 1.037 (5.689), and between presumed latent TB and presumed latent syphilis was 2.055 (5.734) respectively (Table 4). This evidence concerns the gene ACE and Behcet disease.