CD4 and Behcet disease: Frequencies of CD4+Foxp3+ and CD25+Foxp3+ cells were slightly decreased in BD mice compared to those in BDN mice (CD4+Foxp3+: 1.04 ± 0.39% vs. 1.77 ± 1.01%, p = 0.15; CD25+Foxp3+: 1.15 ± 0.58% vs. 2.71 ± 2.31%, p = 0.16) (Figures 3(p) and 3(q)).