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BMC Medical Research Methodology (2007)

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by Biomed Central , Michelle K Williamson , Jane Pirkis , Jon J Pfaff , Orla Tyson , Moira Sim , Ngaire Kerse , Nicola T Lautenschlager , Nigel P Stocks , Nicola T Lautenschlager , Nigel P Stocks , Osvaldo P Almeida