Text and Data Mining valid from 2019-06-20
Received: 12 March 2019
Accepted: 6 June 2019
First Online: 20 June 2019
Conflict of interest
: L. Cozzi acts as a scientific advisor to Varian Medical Systems and is a Clinical Research Scientist at Humanitas Cancer Center. C. Franzese, A. Fogliata, D. Franceschini, P. Navarria, S. Tomatis and M. Scorsetti declare that they have no competing interests.