Rectal Diseases

• Children's and Family Medical Clinic — Allen Park, Michigan, United States
• Downriver Internists — Allen Park, Michigan, United States
• University of Michigan Family Medicine at Domino's — Ann Arbor, Michigan, United States
• University of Michigan Briarwood Family Medicine — Ann Arbor, Michigan, United States

• Cancer Registry of Norway — Oslo, Norway

Not specified

• Minnesota Department of Health — Saint Paul, Minnesota, United States

• Massachusetts General Hospital — Boston, Massachusetts, United States

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

• HEGP — Paris, France

• Institut Català d'Oncologia-L'Hospitalet — L'Hospitalet Del Llobregat, Barcelona, Spain

• Hospital de Gastroenterologia ¨B.Udaondo¨ — Ciudad Autonoma de Buenos Aires, Buenos Aires, Argentina
• Instituto de Oncología "Alexander Fleming" — Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina

• University of California Los Angeles — Los Angeles, California, United States
• Memorial Sloan-Kettering Cancer Center — New York, United States
• University of Pennsylvania — Philadelphia, Pennsylvania, United States
• Vanderbilt Ingram Cancer Center — Nashville, Tennessee, United States