1. International Atomic Energy Agency, Vienna, Austria;
2. Department of Radiation Oncology, Division of Medical Physics, Medical University of Vienna, Vienna, Austria;
3. Christian Doppler Laboratory for Medical Radiation Research for Radiation Oncology, Vienna, Austria;
4. North Estonia Medical Centre, Tallinn, Estonia;
5. Department of Medical Physics, Royal Surrey County Hospital, Guildford, UK;
6. Metrology for Medical Physics (MEMPHYS), National Physical Laboratory, Teddington, UK;
7. Instituto Privado de Radioterapia, Cordoba, Argentina;
8. Department of Oncology and Medical Biophysics, Western University, London, Canada;
9. Department of Medical Physics, Hospital Sant Joan de Reus, IISPV, Tarragona, Spain;
10. Servei de Radiofisica i Radioproteccio, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain;
11. CHU Charleroi, Hopital Andre Vesale, Montigny-le-Tilleul, Belgium