Letter comments on

Hannoun-Levi, Jean-Michel ✉; Gutierrez, Cristina; Polgar, Csaba [Polgár, Csaba (Sugárterápia, kli...), author] National Institute of Oncology; Onkológiai Tanszék (SU / FM / C); Strnad, Vratislav; BCWG of the GEC-ESTRO [Collaborative Organization]