Azienda Policlinico Umberto Primo, Rome, Italy
Herlev Hospital - University Hospital of Copenhagen, Herlev, Denmark
Aarhus Kommunehospital, Aarhus, Denmark
Universitair Ziekenhuis Antwerpen, Edegem, Belgium
Vrije Universiteit Medisch Centrum, Amsterdam, Netherlands
Ospedale Bellaria, Bologna, Italy
Istituto Nazionale per la Ricerca sul Cancro, Genoa, Italy
University Medical Center Nijmegen, Nijmegen, Netherlands
University Hospital Rebro, Zagreb, Croatia
Leiden University Medical Center, Leiden, Netherlands
Lund University Hospital, Lund, Sweden
U.Z. Gasthuisberg, Leuven, Belgium
Institut Gustave Roussy, Villejuif, France
Rotterdam Cancer Institute, Rotterdam, Netherlands
Derbyshire Royal Infirmary, Derby, England, United Kingdom
Beatson Oncology Centre, Glasgow, Scotland, United Kingdom
Academisch Ziekenhuis Utrecht, Utrecht, Netherlands
University Hospital of Linkoping, Linkoping, Sweden
Christie Hospital N.H.S. Trust, Manchester, England, United Kingdom
National Cancer Institute of Egypt, Cairo, Egypt
St. Johannes Hospital - Medical Klinik II, Duisburg, Germany
Universitaetsklinik und Strahlenklinik - Essen, Essen, Germany