CD40LG and systemic lupus erythematosus: From the panel of antibodies investigated, IgM was detected in seven SLE+, with weak (+) to strong (+++) scores, IgG and IgA were detected in one patient each and C3c was detected in 3 patients, compared to only one patient presenting immunostaining against IgM and C3c in only one SLE– patient (Supplementary Table 4).