1. From Georgetown University Medical Center and Cancer Prevention and Control Program, Georgetown-Lombardi Comprehensive Cancer Center, Washington, DC; Harvard Pilgrim Health Care Institute, Dana-Farber Cancer Institute, and Harvard Medical School, Boston, Massachusetts; Albert Einstein College of Medicine, Bronx, New York; Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands;
2. UC Davis School of Medicine, Davis, Stanford University, Stanford, and University of California, San Francisco, San Francisco, California; Group Health Research Institute, Seattle, Washington; Information Management Services, Calverton, and National Cancer Institute, Bethesda, Maryland; Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin; University of Texas MD Anderson Cancer Center, Houston, Texas;
3. Norris Cotton Cancer Center and Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire; and College of Medicine, and University of Vermont, Burlington, Vermont.