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Comment
. 2007 Jul;60(7):753-5.
doi: 10.1016/j.jclinepi.2006.12.008. Epub 2007 Feb 20.

Comment on: "a simple and valid tool distinguished efficacy from effectiveness studies"

Mark G Spigt, Daniel Kotz
Comment

Comment on: "a simple and valid tool distinguished efficacy from effectiveness studies"

Mark G Spigt et al. J Clin Epidemiol. 2007 Jul.
No abstract available

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