<Li> antiphospholipid antibody (especially lupus anticoagulant, which paradoxically increases propensity to thrombosis) </Li> <Li> coagulation factor deficiency (e.g., hemophilia) </Li> <Li> sepsis--coagulation factor consumption </Li> <Li> presence of antibodies against coagulation factors (factor inhibitors) </Li>

Which part of the coagulation pathway is measured by prothrombin time