Validation of the European Oncology toolkit for the self-assessment of Quality of Life (EUonQoL-Kit) in cancer patients and survivors: study protocol of a pan European survey. - Apolone, G.; Costantini, M.; Caselli, L.; Bos, N.; Caraceni, A.; Ciliberto, G.; Couespel, N.; Ferrer, M.; Groenvold, M.; Kaasa, S.; Lombardo, C.; Pietrobon, R.; et al. (BMC Public Health, 2024)