1. Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
2. EORTC Data Centre, Brussels, Belgium
3. Edinburgh Cancer Research UK Centre, Edinburgh, United Kingdom
4. Institute for Neurosurgery, Clinical Center Serbia, Belgrade, Serbia
5. Klinikum der J.W. Goethe Universität Frankfurt, Dr. Senkenbergisches Institut für Neuroonkologie, Frankfurt, Germany
6. Universitätsklinikum Heidelberg, Heidelberg, Germany
7. Maria Sklodowska-Curie Memorial Cancer-Center and Institute of Oncology Gliwice Branch, Radiotherapy and Chemotherapy Clinic, Gliwice, Poland
8. Samsung Medical Center, Seoul, South Korea
9. Universitätsklinikum Freiburg, Allgemeine Neurochirurgie, Freiburg, Germany
10. Universitätsklinikum Regensburg, Neurologie und Wilhelm Sander-Therapieeinheit NeuroOnkologie, Regensburg, Germany
11. Medical Center Haaglanden, The Hague, Netherlands
12. University of Alabama at Birmingham, Birmingham, AL
13. Dana-Farber Cancer Institute, Boston, MA
14. Erasmus MC, Rotterdam, Netherlands
15. Sunnybrook Health Sciences Centre, Toronto, ON, Canada
16. Catholic University of Korea, Seoul St Marys Hospital, Seoul, South Korea
17. Merck KGaA, Darmstadt, Germany
18. University Hospital Zurich, Zurich, Switzerland