The National Library of Medicine invites you to link from your web site to
ClinicalTrials.gov.
If you link to this site, provide proper attribution to the U.S.
National Library of Medicine (NLM) and ClinicalTrials.gov. It must be clear
to users that data and searches are being provided by ClinicalTrials.gov.
Use only real-time data provided directly by ClinicalTrials.gov to ensure that
the most up-to-date and accurate information is provided to the public.
The text shown below should assist you in coding your html link to us.
Paste the block of HTML code provided below directly into your page.
Please observe the form of the ClinicalTrials.gov name,
which should always include an uppercase C and T, a lowercase g, no space
between "Clinical" and "Trials."
This HTML:
<a href="http://clinicaltrials.gov/"
title="Information on Clinical Trials and Human Research Studies">ClinicalTrials.gov</a>
provides patients, family members, and members of the public easy and free access
toinformation on clinical studies for a wide range of diseases and conditions.
Displays this text in a browser:
ClinicalTrials.gov
provides patients, family members, and members of the public easy and free access
to information on clinical studies for a wide range of diseases and conditions.
Links to individual search fields can be constructed, as shown below.
For any multiword search terms (e.g. alzheimer disease), spaces must be
replaced with a "+" character. Unusual characters must be URL encoded.
Searching for Alzheimer disease studies in ClinicalTrials.gov
http://clinicaltrials.gov/search/term=alzheimer+disease
Linking to diabetes studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/condition=diabetes">Diabetes studies in ClinicalTrials.gov</a>
For a multiword term that should be treated as a phrase, the spaces must be replaced with "+" characters
and the entire phrase enclosed in quotes, which are URL encoded as %22. For example,
Linking to lyme disease studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/condition=%22lyme+disease%22">lyme disease studies in ClinicalTrials.gov</a>
Linking to fluoxetine studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/intervention=fluoxetine">fluoxetine studies in ClinicalTrials.gov</a>
Linking to clinical studies sponsored by NHLBI in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/sponsor=NHLBI">Clinical studies sponsored by NHLBI in ClinicalTrials.gov</a>
You may show a specific study protocol record based on NCT number.
The NCT number is NLM's unique identifier for a particular record
and is found at the end of each record.
http://clinicaltrials.gov/show/NCT00004451
ClinicalTrials.gov provides data in XML format as shown below.
Please note that use of ClinicalTrials.gov data is subject to our
Terms and Conditions.
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The search results list can be obtained in XML format by appending a URL parameter, "displayxml=true",
to the end of a search request URL.
Example:
http://clinicaltrials.gov/search/term=%22lyme+disease%22?displayxml=true
By default, this option will return the first 20 search results.
A parameter, "count=100", can be used to get the first 100 results.
Another parameter, "start=101", can be used to get subsequent sets of studies.
In the following example, all three parameters are used to get results 1201-1400 out of
more than 16,000 results found by a search of "cancer".
Example:
http://clinicaltrials.gov/search/term=%22cancer%22?displayxml=true&count=200&start=1201
Caution: The XML for all studies is about 100 MB in size.
If you attempt to display this much XML in your browser, your browser will probably
freeze for several minutes and then crash.
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An individual protocol record can be obtained in XML format by appending a URL parameter, "displayxml=true",
to the end of a study display URL.
Example:
http://clinicaltrials.gov/show/NCT00001372?displayxml=true
The structure of protocol records is defined by this
Document Type Definition (DTD).
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A zip file containing a set of protocol records in XML format can be downloaded by
appending a URL parameter "studyxml=true" to the end of search request URL.
Example:
http://clinicaltrials.gov/search/term=%22lyme+disease%22?studyxml=true
Note that downloads of many studies can take several minutes.
ClinicalTrials.gov makes it easy for web crawlers to find all studies. Each
time the study collection is updated, pages of links to all studies are generated.
Most users will not find these pages useful.