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  1. 1
    Factors that can affect the external validity of randomised controlled trials

    Factors that can affect the external validity of randomised controlled trials Dahkki Rothwell, P

    Almmustuhtton 2006
    Journal article
  2. 2
    Factors that can affect the external validity of randomised controlled trials.

    Factors that can affect the external validity of randomised controlled trials. Dahkki Rothwell, P

    Almmustuhtton 2006
    Journal article

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