title: CD21 deficiency, complement, and the development of common variable immunodeficiency.
authors.forename: Michael M
authors.initials: MM
authors.lastname: Frank
mesh_terms: D000361:Agammaglobulinemia / Q000235:genetics* / Q000276:immunology*; D001402:B-Lymphocytes / Q000378:metabolism*; D006801:Humans; D007239:Infections / Q000276:immunology*; D008297:Male; D017464:Receptors, Complement 3d / Q000378:metabolism*
chemical_list: D017464:Receptors, Complement 3d