title: Improved methods to assay contact activation.
mesh_terms: D001777:Blood Coagulation; D004789:Enzyme Activation; D005174:Factor XII / Q000032:analysis*; D005175:Factor XII Deficiency / Q000097:blood; D006801:Humans; D007610:Kallikreins / Q000097:blood*; D007704:Kininogens / Q000097:blood* / Q000172:deficiency; D008722:Methods; D011288:Prekallikrein / Q000097:blood* / Q000172:deficiency
chemical_list: D007704:Kininogens; D005174:Factor XII; D011288:Prekallikrein; D007610:Kallikreins