1. Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
2. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
3. Dana Faber Cancer Center, Boston, Massachusetts
4. National Cancer Institute, Bethesda, Maryland
5. Division of Cancer Medicine, Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
6. Biomedical Library, Vanderbilt University, Nashville, Tennessee
7. Sunybrook Health Sciences Centre, Toronto, Canada
8. Yale Cancer Center, New Haven, Connecticut