Present state and prospects of fast particle therapy in Europe.
D005060:Europe; D005214:Fast Neutrons; D006258:Head and Neck Neoplasms / Q000532:radiotherapy; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D010315:Particle Accelerators; D010386:Pelvic Neoplasms / Q000532:radiotherapy; D011882:Radiotherapy, High-Energy; D012062:Relative Biological Effectiveness