TNFRSF4 and myasthenia gravis: OX40 expression on CD4+ T cells was significantly higher in MG patients in relapse than in MG patients at baseline and MG patients in remission (P = 0.016 and P = 0.002, respectively), whereas OX40 expression on CD4+ T cells was not significantly different between MG patients at baseline and MG patients in remission (P > 0.05) (Table 3, Figures 2(a) and 2(b)).