1. Dipartimento Oncologico, Casa di Cura ad alta specialità – Pain relief and Palliative Care Unit – La Maddalena, Palermo, Italy
2. RWTH Aachen, Universitätsklinikum Aachen, Klinik für Palliativmedizin, Aachen, Germany
3. Department of Palliative Medicine, The Royal Marsden Hospital, Sutton, Surrey, UK
4. Institut Claudius Regaud, Toulouse and Polyclinique de l’Ormeau, Tarbes, France
5. Schmerz & PalliativZentrum Fulda and PalliativNetz Osthessen, Fulda, Germany
6. Sue Ryder Care Leckhampton Court Hospice and Gloucestershire Hospitals NHS Foundation Trust, Cheltenham, UK
7. Research & Development, Nycomed, Roskilde, Denmark
8. Servicio de Anestesiología, Unidad de Dolor, A Coruña, Spain