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. Author manuscript; available in PMC: 2009 Apr 18.
Published in final edited form as: J Clin Epidemiol. 2005 Oct;58(10):1042–1051. doi: 10.1016/j.jclinepi.2005.02.024

Fig. 1.

Fig. 1

Risk differences of venographic DVT and clinical VTE measured by 29 randomized controlled trials; area of each study is proportional to the number of patients.