http://ctep.cancer.gov/resources/coop2.html
CTEP supports 11 organizations conducting cancer treatment trials through the Clinical Trials Cooperative Group Program. Emphasis is placed on the development and conduct of large, multicenter, randomized phase III studies. Although the program’s mission encompasses a wide variety of investigational efforts, the cooperative groups do not replace funding mechanisms for more narrowly focused research project grants, such as RO1 and PO1 grants or U01 and U19 cooperative agreements.
Cooperative groups consist of networks of researchers who develop and conduct cancer treatment clinical trials. The Clinical Trials Cooperative Group Program reaches scientists and patients throughout the nation:
Each cooperative group receives support so that it can generate trials compatible with its particular areas of interest and expertise. Unlike most other NIH cooperative clinical trials efforts, the cooperative groups’ funding is not linked to a specific clinical trial.