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MLA Citation
Unknown. Sample sizes for clinical trials. Boca Raton, FL : CRC Press/Taylor & Francis, 2010. http://access.bl.uk/ark:/81055/vdc_100045387089.0x000001
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Unknown. Sample sizes for clinical trials. Boca Raton, FL : CRC Press/Taylor & Francis, 2010. http://access.bl.uk/ark:/81055/vdc_100045387089.0x000001