About Us

Photo courtesy of Duke Children's Hospital

The Children’s Oncology Group (COG), a National Cancer Institute supported clinical trials group, is the world’s largest organization devoted exclusively to childhood and adolescent cancer research. The COG unites more than 9,000 experts in childhood cancer at more than 200 leading children’s hospitals, universities, and cancer centers across North America, Australia, New Zealand, and Europe in the fight against childhood cancer.

Today, more than 90% of 14,000 children and adolescents diagnosed with cancer each year in the United States are cared for at Children’s Oncology Group member institutions. COG’s unparalleled collaborative efforts provide the information and support needed to answer important clinical questions in the fight against cancer.

The Children’s Oncology Group has nearly 100 active clinical trials open at any given time. These trials include front-line treatment for many types of childhood cancers, studies aimed at determining the underlying biology of these diseases, and trials involving new and emerging treatments, supportive care, and survivorship.

The Children’s Oncology Group research has turned children’s cancer from a virtually incurable disease 50 years ago to one with a combined 5-year survival rate of 80% today.  Our goal is to cure all children and adolescents with cancer, reduce the short and long-term complications of cancer treatments, and determine the causes and find ways to prevent childhood cancer.

Group Chair's Office
Douglas S. Hawkins, MD
Seattle Children's Research Institute
Mailstop: JMB 9
1900 9th Avenue
Seattle, WA 98101
Tel: (206) 884-1107
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Group Vice Chair's Office
Lia Gore, MD
Children's Hospital Colorado
Center for Cancer & Blood Disorders
Pediatrics, Mail Stop 8302
PO Box 6511
Aurora, CO 80045
Tel: (720) 777-4159
Fax: (720) 777-7279
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Group Statistician
Todd A. Alonzo, Ph.D.
COG Statistics and Data Center- Monrovia
Professor of Research, University of Southern California
800 Royal Oaks Drive, Suite 210
Monrovia, CA 91016
Tel: (626) 241-1522
Fax: (626) 445-4334
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

COG Operations Center
800 Royal Oaks Drive, Suite 210
Monrovia, CA 91016
Tel: (626) 241-1500
Fax: (626) 445-4334

COG Statistics and Data Center
Headquarters
800 Royal Oaks Drive, Suite 210
Monrovia, CA 91016
Tel: (626) 241-1500
Fax: (626) 445-4334

Gainesville Office
6011 NW 1st Place
Gainesville, FL 32607
Tel: (352) 273-0556
Fax: (352) 392-8162