CD4+ cells from patients with Common Variable Immunodeficiency have a reduced ability of CD40 ligand membrane expression after in vitro stimulation.
Brugnoni D, Airò P, Lebovitz M, Malacarne F, Ugazio AG, Notarangelo LD, Plebani A, Cattaneo R. CD4+ cells from patients with Common Variable Immunodeficiency have a reduced ability of CD40 ligand membrane expression after in vitro stimulation. Pediatr Allergy Immunol. 1996 Nov; 7(4):176-9.