1. Velindre Cancer Centre, Whitchurch, Cardiff, United Kingdom
2. Universitätsklinikum Hamburg-Eppendorf, Germany
3. Hospital Clinic, Barcelona, Spain
4. Leiden University Medical Center, Leiden, The Netherlands
5. Centre Antoine-Lacassagne, Nice, France
6. ZNA Middelheim, Antwerp, Belgium
7. University Hospital, Ghent, Belgium