Surgery With or Without Radiation Therapy in Untreated Nonmetastatic Retroperitoneal Sarcoma

Hopitaux Universitaires Bordet-Erasme - Institut Jules Bordet (101), Brussels

CHUM - Centre Hospitalier de l'Université de Montreal - Hopital Notre-Dame, Montreal Quebec

Leiden University Medical Centre, Leiden

University Copenhagen, Herlev

U.Z. Gasthuisberg, Leuven

Radboud University Medical Center, Nijmegen

Istituto Clinico Humanitas, Milan

Hospital Universitario San Carlos, Madrid

Institut Bergonie, Bordeaux

Centro Di Riferimento Oncologico, Aviano

Istituto Oncologico Veneto, Padua

Universitaetsklinikum, Cologne

Karolinska University Hospital, Stockholm

Klinikum der Universitaet, München

Institut Gustave Roussy, Villejuif

Dana-Farber Cancer Institute & Harvard Medical School, Boston

Mount Sinai Hospital, Toronto

Centre Leon Berard, Lyon

UniversitaetsMedizin Mannheim, Mannheim

Technische Universitaet Muenchen, München

Fondazione IRCCS Istituto Nazionale dei Tumori, Milan

The Netherlands Cancer Institute-Antoni Van Leeuwenhoekziekenhuis, Amsterdam

University Medical Center Groningen, Groningen

University Hospitals Bristol NHS Foundation Trust - Bristol Haematology And Oncology Centre, Bristol

Leeds Teaching Hospitals NHS Trust - St. James'S University Hospital, Leeds

Royal Marsden Hospital - Chelsea, London, London

Christie NHS Foundation Trust, Manchester

Nottingham University Hospitals NHS Trust - City Hospital campus, Nottingham

Radium Hospitalet, Oslo

Maria Sklodowska-Curie Memorial Cancer Center, Warsaw

Hospital General Vall d'Hebron, Barcelona

Queen Elizabeth Medical Center, Birmingham

General Western Hospital, Edinburgh

Beatson-Gartnavel General Hospital, Glasgow

University College Hospital, London

Freeman Hospital, Newcastle

Weston Park Hospital, Sheffield