15 Bryant Bryant A A Calver Calver NC NC Toubi Toubi E E Webster Webster AD AD Farrant Farrant J J Classification of patients with common variable immunodeficiency by B-cell secretion of IgM and IgG in response to anti-IgM and interleukin-2 Classification of patients with common variable immunodeficiency by B-cell secretion of IgM and IgG in response to anti-IgM and interleukin-2 Clin Immunol Immunopathol. This evidence concerns the gene CD40LG and common variable immunodeficiency.