title: Cold urticaria and complement C2 deficiency.
mesh_terms: D000328:Adult; D003080:Cold Temperature; D003175:Complement C2 / Q000172:deficiency; D003533:Cyproheptadine / Q000627:therapeutic use; D005260:Female; D006801:Humans; D014581:Urticaria / Q000188:drug therapy / Q000276:immunology*
chemical_list: D003175:Complement C2; D003533:Cyproheptadine