CD40LG and atrial fibrillation: In comparison, the concentrations of IgG in a patient with alcoholic liver cirrhosis (2.13 g l−1) and in a patient with chronic active hepatitis (2.74 g l−1) were approximately 1/4 of the lower limit measured for NHS (8.0–18.0 g l−1), while the IgM levels in these samples were within the same range as in the malignant AF.