1 Laboratory of Radiation Physics, Odense University Hospital, Denmark; Institute of Clinical Research, University of Southern Denmark, Odense, Denmark; Institute of Medical Physics, School of Physics, University of Sydney, Australia; Danish Centre for Particle Therapy, Aarhus University Hospital, Denmark.
2 Department Oncology - Laboratory of Experimental Radiotherapy, KU Leuven, Belgium; Radiation Oncology, UZ Leuven, Belgium.
3 Metrology for Medical Physics Centre, National Physical Laboratory, Teddington, UK.
4 Erasmus MC Cancer Institute, Radiation Oncology, Rotterdam, The Netherlands.
5 Servei de Radiofísica I Radioprotecció, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
6 Amsterdam University Medical Center, The Netherlands.
7 Radiation Oncology Department, University Hospital Zurich, Switzerland.
8 Institute of Medical Physics, School of Physics, University of Sydney, Australia.