title: Preparation and use of a new artificial system for factor XI assay.
mesh_terms: D000042:Absorption; D001778:Blood Coagulation Disorders / Q000175:diagnosis; D001780:Blood Coagulation Tests; D005172:Factor XI / Q000032:analysis*; D006801:Humans; D007202:Indicators and Reagents; D008722:Methods; D012822:Silicon Dioxide
chemical_list: D007202:Indicators and Reagents; D012822:Silicon Dioxide; D005172:Factor XI