germ cell tumors. The large multi-site structure of COG also allows it to conduct research into very rare childhood cancer including retinoblastoma, hepatoblastoma, and other tumors. In addition to disease specific research, COG conducts studies in developmental therapeutics (new cancer drug development), supportive care, epidemiology, stem cell transplantation, behavioral sciences and survivorship. Funding The COG is primarily funded by the NCI, the primary or Chair's grant supports research operations and funds personnel at member institutions conducting research, and the statistics and data center grant supports these essential research functions. Other key grants include the COG Phase 1 Consortium grant, supporting 21 COG institutions charged with early phase clinical trials, and the Community Cancer Oncology Program (CCOP) grant. There is additional funding from other granting agencies and from philanthropic sources. References External links COG Foundation Cancer organizations based in the United States Clinical trial organizations United States