Chondrosarcomas

• First Department of Orthopaedic Surgery, St. Anne's University Hospital and Faculty of Medicine, Masaryk University, Brno, Czechia — Brno, South Moravian, Czechia

• Hopital Jean Monjoz — Besançon, France
• Institut Bergonie — Bordeaux, France
• Centre Francois Baclesse — Caen, France
• Centre Georges Francois Leclerc — Dijon, France

• Abramson Cancer Center of the University of Pennsylvania — Philadelphia, Pennsylvania, United States

Not specified

• University of Florida Proton Therapy Institute — Jacksonville, Florida, United States