title: Hypogammaglobulinemia in cystic fibrosis.
mesh_terms: D000361:Agammaglobulinemia / Q000209:etiology*; D003550:Cystic Fibrosis / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*
chemical_list: D007074:Immunoglobulin G