TheCancerZone.com

PDQ (Physician Data Query) is NCI’s comprehensive cancer database. It contains peer-reviewed summaries on cancer treatment, screening, prevention, genetics, and supportive care; a registry of approximately 1,800 open and 12,000 closed cancer clinical trials from around the world; and directories of physicians, professionals who provide genetics services, and organizations that provide cancer care.

http://www.cancer.gov/cancerinfo/pdq/cancerdatabase