The first received date is the date when the clinical trial was first submitted
to ClinicalTrials.gov. There is often a delay of a few days before the
trial is available on the ClinicalTrials.gov website.
Clinical trial records are often updated after they have
been published. The first received, last updated, start, and end dates are
all displayed in the full text view of the clinical trial.
Specify a From date to find the most recent trials.
Specify both From and To dates to find trials submitted during a certain period.
If no dates are given, all trials will be included.
Dates should be given in a MM/DD/YYYY format, as in 1/1/2006 or 8/17/2004.