Anus Diseases

• Hospital Universitario Germans Trias i Pujol. Institut Català Oncologia — Badalona, Barcelona, Spain
• Corporació Sanitaria Parc Taulí — Sabadell, Barcelona, Spain
• Hospital Infanta Sofía — San Sebastián de los Reyes, Madrid, Spain
• Centro Oncológico de Galicia — A Coruña, Spain

• hospital universitario San Vicente Fundacion — Medellín, Antioquia, Colombia

• Groupe Hospitalier Paris Saint Joseph — Paris, Île-de-France Region, France

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

• Mansoura university hospital — Al Mansurah, Dakahlia Governorate, Egypt

• University of Vermont Medical Center — Burlington, Vermont, United States
• University of Vermont Medical Center Fanny Allen Campus — Colchester, Vermont, United States

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

Not specified

• Krankenhaus Nordwest — Frankfurt, Germany

• University of California Davis Comprehensive Cancer Center — Sacramento, California, United States
• Stanford Cancer Institute — Stanford, California, United States
• University of Colorado School of Medicine — Aurora, Colorado, United States
• Denver VA Medical Center-ECHCS — Denver, Colorado, United States