CD40LG and gastritis: We found 75% (0.921 ± 0.633) and 94% (2.144 ± 0.997) of gastritis patient serum samples were seropositive for IgM and IgG, respectively (Supplementary Tables S3 and S4 and Figure 3) on the basis of respected cut0ff value = Mean of negative control + 0.250.