plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent plasma thromboplastin antecedent