title: Evaluation of a photoelectric clot timer in the performance of prothrombin time.
mesh_terms: D000327:Adsorption; D001331:Automation; D001780:Blood Coagulation Tests / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D006801:Humans; D008433:Mathematics; D011517:Prothrombin Time; D013997:Time Factors