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(A) Risk of recurrent venous thromboembolism in 6 months in randomized controlled trials of LMWH vs VKA (random effect model). (B) Risk of major bleeding in 6 months in randomized controlled trials of LMWH vs VKA (random effect model). CI, confidence interval; LMWH, low‐molecular‐weight heparin; M‐H, Mantel‐Haenszel; VKA, vitamin K antagonists
