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Physician Data Query (PDQ) is the National Cancer Institute's (NCI's) comprehensive cancer information database.
The PDQ database contains summaries of the latest published information on cancer prevention, detection, genetics, treatment, supportive care, and complementary and alternative medicine. The health professional versions have detailed information written in technical language.
Information about using the images in this summary, along with many other images related to cancer can be found in Visuals Online.
However, a user would be allowed to write a sentence such as “NCI’s PDQ cancer information summary about breast cancer prevention states the risks in the following way: [include excerpt from the summary].” The best way to cite this PDQ summary is: PDQ® Integrative, Alternative, and Complementary Therapies Editorial Board. It cannot be given by the National Cancer Institute.
Some clinical trials are open only to patients who have not started treatment.
Clinical trials are listed in PDQ and can be found online at NCI's website.
Trials are based on past studies and what has been learned in the laboratory.
Each trial answers certain scientific questions in order to find new and better ways to help cancer patients.