1. Department of Biostatistics; European Organization for Research and Treatment of Cancer; Brussels Belgium
2. Department of Medical Oncology; Radboud University Medical Center; Nijmegen the Netherlands
3. Centre Léon Bérard, Université Claude Bernard Lyon; Lyon France
4. Sarcoma Oncology Center; Santa Monica Oncology Center; Santa Monica California
5. Sarcoma Unit; Royal Marsden Hospital; London United Kingdom
6. National Cancer Institute of Milan; Foundation for the Scientific Institute for Research, Hospitalization, and Health Care; Milan Italy
7. GlaxoSmithKline Oncology; Uxbridge United Kingdom
8. Medical and Pharmacovigilance Department; European Organization for Research and Treatment of Cancer; Brussels Belgium
9. Department of Medical Psychology; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
10. Maria Sklodowska Curie Memorial Cancer Center and Institute of Oncology; Warsaw Poland
11. Institute of Mother and Child; Warsaw Poland