C Hahn (OncoRay – National Center for Radiation Research in Oncology), J Ödén (RaySearch Laboratories AB), A Dasu (The Skandion Clinic), A Vestergaard (Danish Centre for Particle Therapy), M Fuglsang Jensen (Danish Centre for Particle Therapy), O Sokol (GSI Helmholtz Centre for Heavy Ion Research), C Pardi (I-SEE (Internet-Simulation Evaluation Envision)), F Bourhaleb (I-SEE (Internet-Simulation Evaluation Envision)), A Leite (Institut Curie), L de Marzi (Institut Curie), E Smith (Christie Medical Physics and Engineering), A Aitkenhead (Christie Medical Physics and Engineering), C Rose (Christie Medical Physics and Engineering), M Merchant (Christie Medical Physics and Engineering), K Kirkby (Christie Medical Physics and Engineering), L Grzanka (Institute of Nuclear Physics Polish Academy of Sciences), J Pawelke (OncoRay – National Center for Radiation Research in Oncology), A Lühr (OncoRay – National Center for Radiation Research in Oncology)