NCI clinical trials cooperative group

(…koh-OP-uh-ruh-tiv GROOP) A group of researchers, cancer centers, and community doctors who are involved in studies of new cancer treatment, prevention, early detection, quality of life, and rehabilitation. Clinical trials carried out by cooperative groups are sponsored by the National Cancer Institute (NCI), and large numbers of patients take part in many locations. Examples include the Radiation Therapy Oncology Group (RTOG), Gynecologic Oncology Group (GOG), and Children's Oncology Group (COG).