Rectal Neoplasms

• Florida Cancer Specialists — Sarasota, Florida, United States
• Peggy and Charles Stephenson Oklahoma Cancer Center — Oklahoma City, Oklahoma, United States
• Sarah Cannon Research Institute SCRI — Nashville, Tennessee, United States
• Tennessee Oncology PLLC — Nashville, Tennessee, United States

Not specified

• Toronto General Hospital — Toronto, Ontario, Canada

• OHSU Knight Cancer Institute — Portland, Oregon, United States

• UCLA Clinical AIDS Research and Education (CARE) Center — Los Angeles, California, United States
• UCSF Helen Diller Family Comprehensive Cancer Center — San Francisco, California, United States
• Boston University Cancer Research Center — Boston, Massachusetts, United States
• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States

• Stanford University School of Medicine — Stanford, California, United States

• Emory University Hospital-Winship Cancer Institute — Atlanta, Georgia, United States

• Warren Grant Magnuson Clinical Center - NCI Clinical Studies Support — Bethesda, Maryland, United States
• Center for Cancer Research — Bethesda, Maryland, United States
• Massachusetts General Hospital Cancer Center — Boston, Massachusetts, United States
• Brigham and Women's Hospital — Boston, Massachusetts, United States

• UCSF Comprehensive Cancer Center — San Francisco, California, United States
• Memorial Sloan-Kettering Cancer Center — New York, United States

• LA Gay & Lesbian Community Service Ctr., Lamba Med. Group CRS — Los Angeles, California, United States
• Castro-Mission Health Ctr. CRS — San Francisco, California, United States
• Univ. of Colorado Health Science Ctr. CRS — Denver, Colorado, United States
• Eastside Family Health Ctr. CRS — Denver, Colorado, United States