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10946 Studies found for: Placebo AND once

Terms and Synonyms Searched:

Terms Search Results* Entire Database**
Synonyms
Placebo 10,946 studies 59,591 studies
placebo-controlled 5,558 studies 24,515 studies
sham treatment 40 studies 423 studies
sham therapy 24 studies 193 studies
fake drug -- 1 studies
once 10,946 studies 33,668 studies
Single event 4 studies 25 studies

   
-- No studies found
* Number of studies in the search results containing the term or synonym
** Number of studies in the entire database containing the term or synonym