Eastern Cooperative Oncology Group, Boston, Massachusetts, United States
UC Davis Cancer Center, Sacramento, California, United States
National Cancer Institute of Canada Clinical Trials Group, Kingston, Ontario, Canada
City of Hope Comprehensive Cancer Center, Duarte, California, United States
Brigham and Women's Hospital, Boston, Massachusetts, United States
Children's Oncology Group, Arcadia, California, United States
Ohio State University Medical Center, Columbus, Ohio, United States
National Institutes of Health Clinical Center, Bethesda, Maryland, United States
Cancer and Leukemia Group B, Chicago, Illinois, United States
USC/Norris Comprehensive Cancer Center and Hospital, Los Angeles, California, United States
Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, California, United States
San Francisco General Hospital Medical Center, San Francisco, California, United States