8Silverstein MD, Heit JA, Mohr DN, et al. Trends in the incidence of deep vein thrombosis and pulmonary embolism : a 25-year population-based study[J]. Arch Intern Med, 1998, 158(6) : 585 - 593.
9Heir JA, Silverstein MD, Mohr DN, et al. Predictors of survival after deep vein thrombosis and pulmonary embolism: a populationbased, cohort study [ J]. Arch Intern Med, 1999, 159 (5) : 445 - 453.