Try the modernized ClinicalTrials.gov beta website. Learn more about the modernization effort.
Working…
ClinicalTrials.gov
ClinicalTrials.gov Menu
Open or close the search fields display
42991 Studies found for: during AND before

Terms and Synonyms Searched:

Terms Search Results* Entire Database**
Synonyms
during 42,991 studies 125,315 studies
before 42,991 studies 96,705 studies
Prior 16,258 studies 36,531 studies
Leading 4,189 studies 10,347 studies
preceding 1,287 studies 2,311 studies
preceded 397 studies 737 studies
Status pre- 6 studies 11 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