In a double dummy trial, there are usually two placebos.

JLL Essay
The need to avoid differences in the way outcomes are assessed



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JLL Book of EssaysHave you read the James Lind Library's Introduction to Fair Tests of Treatments?

We have edited, updated and abridged all of the Essays from the Library for 2019, and lavishly illustrated them with examples from the history of fair tests of treatments.  Share and enjoy!

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