NCOA5 and Genital ulcers: Second, the CT genotype of the NCOA5 rs2903908 polymorphism seemed to predispose the BD patients to develop both genital ulceration and uveitis more frequently (approximately three-fold for genital ulceration and two-fold for uveitis), whereas the TT genotype of NCOA5 rs2903908 polymorphism was found to have protective impacts on developing genital ulceration or uveitis in the patients with BD.