Radiotherapy and Oncology, 160, 259-265. ELSEVIER IRELAND LTD Radiotherapy and Oncology, 160, 259-265. Elsevier Ireland Ltd Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, Vol. 160, no.160, p. 259-265 (2021) Radiotherapy and Oncology 160(2021), 259-265