Their risk of AIHA in IgG aCL (OR 2.27, 95% CI 1.71–3.00) was slightly higher than ours (OR 2.23, 95% CI 1.41–3.52) whereas their risk of AIHA in IgM (OR 2.89, 95% CI 2.16–3.87) was almost four times lower than ours (OR 8.66, 95% CI 3.68–20.36). This evidence concerns the gene CD40LG and autoimmune hemolytic anemia.