National Surgical Adjuvant Breast and Bowel Project, Pittsburgh, Pennsylvania, United States
Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois, United States
Monroe Medical Associates, Chicago, Illinois, United States
University of Chicago Cancer Research Center, Chicago, Illinois, United States
National Institutes of Health Clinical Center, 9000 Rockville Pike, Bethesda, Maryland, United States
Montefiore Medical Center, Bronx, New York, United States
Johns Hopkins University, Baltimore, Maryland, United States
Stanford University, Stanford, California, United States
Warren Grant Magnuson Clinical Center - NCI Clinical Studies Support, Bethesda, Maryland, United States
Cancer and Leukemia Group B, Chicago, Illinois, United States
Arthur G. James Cancer Hospital and Solove Research Institute at Ohio State University Medical Center, Columbus, Ohio, United States
City of Hope, Duarte, California, United States