title: Letter: C1-esterase inactivators and C4 in malignant diseases.
mesh_terms: D003172:Complement C1 / Q000378:metabolism*; D003174:Complement C1 Inactivator Proteins; D003181:Complement C4 / Q000378:metabolism*; D003165:Complement System Proteins / Q000378:metabolism*; D004950:Esterases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D006801:Humans; D009369:Neoplasms / Q000276:immunology / Q000378:metabolism*
chemical_list: D003172:Complement C1; D003174:Complement C1 Inactivator Proteins; D003181:Complement C4; D003165:Complement System Proteins; D004950:Esterases