title: [Complement component deficiency].
mesh_terms: D003186:Complement C9 / Q000172:deficiency*; D006801:Humans; D007564:Japan; D008403:Mass Screening; D008581:Meningitis / Q000150:complications; D009017:Morbidity; D018805:Sepsis / Q000150:complications
chemical_list: D003186:Complement C9