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Cluster randomized trial of an active, multifaceted information dissemination intervention based on The WHO Reproductive health library to change obstetric practices: methods and design issues [ISRCTN14055385]

A Metin Gülmezoglu email, José Villar email, Jeremy Grimshaw email, Gilda Piaggio email, Pisake Lumbiganon email and Ana Langer email

BMC Medical Research Methodology 2004, 4:2doi:10.1186/1471-2288-4-2

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