Hopital Universitaire Erasme, Brussels, Belgium
Hopital Civil de Charleroi, Charleroi, Belgium
Clinique Sainte Elisabeth, Namur, Belgium
Vrije Universiteit Medisch Centrum, Amsterdam, Netherlands
Leiden University Medical Center, Leiden, Netherlands
David Maddison Clincial Sciences, Newcastle, Australia
Allgemeines Krankenhaus der Stadt Wien, Vienna, Austria
Ospedale Mauriziano Umberto I, Torino, Italy
Queen Elizabeth Hospital, Gateshead, England, United Kingdom
Institut Jules Bordet, Brussels, Belgium
Hospital Universitario 12 de Octubre, Madrid, Spain
Ospedale San Giovanni, Bellinzona, Switzerland
Virga Jesse Hospital, Hasselt, Belgium
U.Z. Gasthuisberg, Leuven, Belgium
Martin Faculty Hospital, Martin, Slovakia
University of Copenhagen, Copenhagen, Denmark
Cliniques Universitaires Saint-Luc, Brussels, Belgium
Medisch Spectrum Twente, Enschede, Netherlands
National Institute of Oncology, Budapest, Hungary
Churchill Hospital, Oxford, England, United Kingdom
Institut Jules Bordet, Brussels (Bruxelles), Belgium
St. Johannes Hospital - Medical Klinik II, Duisburg, Germany
Universitaetsklinikum Halle, Halle (Saale), Germany
Institut Jules Bordet, Brussels, Belgium
Universitaetsklinik Duesseldorf, Duesseldorf, Germany
Klinik & Poliklinik fur Strahlentherapie der Universitat zu Koln, Koln, Germany
Universitair Ziekenhuis Antwerpen, Edegem, Belgium
Hospital Universitario 12 de Octubre, Madrid, Spain
Instituto Valenciano De Oncologia, Valencia, Spain