Rectal Neoplasms

• Mayo Clinic Cancer Center — Rochester, Minnesota, United States
• Memorial Sloan-Kettering Cancer Center — New York, United States
• Ludwig Institute for Cancer Research-Sydney Branch — Sydney, New South Wales, Australia

• North Central Cancer Treatment Group — Rochester, Minnesota, United States

Not specified

• Warren Grant Magnuson Clinical Center - NCI Clinical Studies Support — Bethesda, Maryland, United States
• Kimmel Cancer Center at Thomas Jefferson University - Philadelphia — Philadelphia, Pennsylvania, United States
• Fox Chase Cancer Center — Philadelphia, Pennsylvania, United States
• Vanderbilt-Ingram Cancer Center at Vanderbilt Medical Center — Nashville, Tennessee, United States

• Memorial Sloan-Kettering Cancer Center — New York, United States

• Memorial Sloan-Kettering Cancer Center — New York, United States

• Vince Lombardi Cancer Clinic at Aurora St. Luke's Medical Center — Milwaukee, Wisconsin, United States

• Grupo Oncologico Cooperativo del Sur — Bahía Blanca, Buenos Aires, Argentina

• Arizona Clinical Research Center — Tucson, Arizona, United States
• Arkansas Cancer Clinic, P.A. — Pine Bluff, Arkansas, United States
• Citrus Valley Medical Center — Covina, California, United States
• Cancer Center and Beckman Research Institute, City of Hope — Duarte, California, United States

• Memorial Sloan-Kettering Cancer Center — New York, United States