Skinnerup Byskov, C. et al. 2025. Radiotherapy quality assurance in the PROTECT trial – a European randomised phase III-trial comparing proton and photon therapy in the treatment of patients with oesophageal cancer. Acta Oncologica. 64, (Mar. 2025), 406–414. DOI:https://doi.org/10.2340/1651-226X.2025.42774.