http://www.cancer.gov/cancer_information/doc.aspx?viewid=9D617786-179B-4DB7-8664-885DD33E7D51
National Cancer Institute, National Institutes of Health
The PDQ® database contains peer-reviewed summaries on cancer treatment, screening, prevention, and supportive care; a registry of approximately 1,800 open and 10,300 closed cancer clinical trials from around the world; and directories of physicians, genetic counselors, and organizations that provide cancer care.