1. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
2. Center for Radiation Oncology KSA-KSB, Kantonsspital Aarau, Aarau, Switzerland
3. Department of Radiation Oncology, University Medical Center–Groningen, Groningen, the Netherlands
4. Department of Radiotherapy, Gustave Roussy Cancer Campus, Universite Paris-Saclay, Villejuif, France