8Girard P, Decousus M, Laporte S, et al. Diagnosis of pulmonary embolism in patients with proximal deep vein thrombosis: specificity of symptoms and perfusion defects at baseline and during anticoagulant therapy [J]. Am J Respir Crit Care Med, 2001, 164:1033 -1037.
9British thoracic society standards of care committee pulmonary embolism guideline development group. British Thoracic Society guidelines for the management of suspected acute pulmonary embolism [ J ]. Thorax,2003, 58 : 470 -483.
10Kearon C. Diagnosis of pulmonary emoblism [J]. CMAJ, 2003, 168(2): 183-194.