title: Immunodeficiency in sickle-cell anemia.
mesh_terms: D000755:Anemia, Sickle Cell / Q000276:immunology*; D003165:Complement System Proteins / Q000032:analysis; D006801:Humans; D007153:Immunologic Deficiency Syndromes; D009895:Opsonin Proteins / Q000032:analysis; D011414:Properdin / Q000032:analysis
chemical_list: D009895:Opsonin Proteins; D011414:Properdin; D003165:Complement System Proteins