Rectal Diseases

• Division of Graduate Entry Medicine and Health, School of Medicine, University of Nottingham. Royal Derby Hospital, — Derby, Derbyshire, United Kingdom

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

• USC Norris Comprehensive Cancer Center — Los Angeles, California, United States
• Sharp Memorial Hospital — San Diego, California, United States
• Florida Cancer Specialists-Broadway — Fort Myers, Florida, United States
• Hematology - Oncology Associates of Treasure Coast — Port Saint Lucie, Florida, United States

• Hospital Son Dureta — Palma de Mallorca, Balearic Islands, Spain
• Hospital San Juan de Dios del Aljarafe — Bormujos, Sevilla, Spain
• Hospital Juan Ramón Jimenez — Huelva, Spain
• Hospital Universitario La Paz — Madrid, Spain

• Universitary Clinical Surgery — Mannheim, Germany
• Lozano Blesa Clinical Hospital — Zaragoza, Aragon, Spain
• Virgen Del Camino Hospital — Pamplona, Navarre, Spain
• Mutua de Terrasa Hospital — Tarrasa, Tarragona, Spain

• Spanish Cooperative Group for Digestive Tumour Therapy — Madrid, Spain

• Spanish Cooperative Group for the Treatment of Digestive Tumors — Madrona, Spain

• Spanish Cooperative Group for Digestive Tumour Therapy — Madrid, Spain

Not specified

• First Affiliated Hospital of Xi'an Jiaotong University — Xi'an, Shaanxi, China