Adaptive radiotherapy in head and neck cancer is required to avoid tumor underdose. - Castelli, J.; Simon, A.; Rigaud, B.; Chajon, E.; Thariat, J.; Benezery, K.; Vauleon, E.; Jegoux, F.; Henry, O.; Lafond, C.; de Crevoisier, R. (Acta Oncologica, 2018)