Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...


Last Updated—Specify a From date to find studies updated on on or after that date. Specify a To date to find studies updated on or before that date. Specify both From and To dates to find studies that were updated during a certain time period. If no dates are entered, all studies will be included in your search results.
Dates should be entered in MM/DD/YYYY format. For example, March 1, 2010, is entered as "03/01/2010."
The Last Updated date is the most recent date on which changes to a study record were submitted to There may be a delay between the Last Updated date and when the updated study information is available on Also, this date may be different from the Last Verified date.