1 Department of Radiation Oncology, Iridium Cancer Network, Wilrijk, Antwerp, Belgium; Oncologic Centre GZA, Translation Cancer Research Unit, Antwerp, Belgium. Electronic address: charlotte.billiet@gza.be.
2 Department of Radiation Oncology, Iridium Cancer Network, Wilrijk, Antwerp, Belgium; Oncologic Centre GZA, Translation Cancer Research Unit, Antwerp, Belgium.
3 Department of Radiation Oncology (MAASTRO clinic), Maastricht University Medical Centre, GROW, Maastricht, The Netherlands.