1. EBG MedAustron GmbH; Marie Curie-Straße 5 A-2700 Wiener Neustadt Austria
2. National Physical Laboratory; Hampton Road TW11 0LW Teddington UK
3. Centre Léon Bérard; CREATIS, Université de Lyon, CNRS UMR5220, Inserm U1044, INSA-Lyon, Université Lyon 1; 69007 Lyon France
4. Christian Doppler Laboratory for Medical Radiation Research for Radiation Oncology; Medical University of Vienna; Vienna Austria
5. Department of Radiation Oncology; Medical University of Vienna/AKH Vienna; Vienna Austria
6. Department of Physics and Chemistry; University of Palermo; Viale delle Scienze, Edificio 18 90128 Palermo Italy