European Organization for the Research and Treatment of Cancer
ESMO – European Society of Medical Oncology
Australia
Belgium
Canada
Cancer Care Ontario – Sarcoma Disease Site Group
England
The Royal Marsden Sarcoma Unit
France
Germany
India
Italy
Istituto Nazionale Tumori in Milan
Istituto Ortopedico Rizzoli in Bologna
Netherlands
Universitair Medisch Centrum Groningen
Russia
Children and Parents Against Cancer – Russia
Spain
Sweden
Scandinavian Sarcoma Group