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Moustgaard H, Clayton GL, Jones HE, Boutron I, Jørgensen L, Laursen DRT, Olsen MF, Paludan-Müller A, Ravaud P, Savović J, Sterne JAC, Higgins JPT, Hróbjartsson A (2020). Impact of blinding on estimated treatment effects in randomised clinical trials: meta-epidemiological study. BMJ 368, l6802