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Hrobjartsson A, Gotzsche PC
Is the placebo powerless? An analysis of clinical trials comparing placebo with no treatment
N Engl J Med. 2001 May 24;344(21):1594-602
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Pinede L, Ninet J, Duhaut P, Chabaud S, Demolombe-Rague S, Durieu I, Nony P, Sanson C, Boissel JP; Investigators of the "Duree Optimale du Traitement AntiVitamines K" (DOTAVK) Study
Comparison of 3 and 6 months of oral anticoagulant therapy after a first episode of proximal deep vein thrombosis or pulmonary embolism and comparison of 6 and 12 weeks of therapy after isolated calf deep vein thrombosis
Circulation. 2001 May 22;103(20):2453-60