¹Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden; ²Department of Radiation Physics, Institute of Clinical Sciences, The Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden; ³Regional Cancer Center West, The Western Sweden Healthcare region, Sahlgrenska University Hospital, Gothenburg, Sweden; ⁴Umeå Institute of Design, Umeå University , Umeå, Sweden; ⁵Department of Radiotherapy, G3:03, Karolinska University Hospital, Stockholm, Sweden; ⁶Department of Radiation Physics, Institute of Clinical Sciences, the Sahlgrenska Academy Gothenburg University, Gothenburg, Sweden

¹RWTH Aachen University, Radiation Oncology department, Aachen, Germany; ²RWTH Aachen university, Radiation Oncology department , Aachen, Germany

¹Campus Bio-Medico University, Radiation Oncology, Rome, Italy; ²Campus Bio-Medico University, General Surgery, Rome, Italy

¹Coimbra Hospital and University Center, Radiation therapy, Coimbra, Portugal; ²Coimbra Hospital and University Center, Oncology, Coimbra, Portugal

¹University Hospital Miguel Servet, Radiation oncology, Zaragoza, Spain