Kinggaard Lilja-Fischer, J. et al. 2019. Distinguishing recurrence and new primary tumor as well as the origin of neck metastases in head and neck cancer clinical trials by targeted DNA sequencing. Acta Oncologica. 58, 10 (Oct. 2019), 1506–1508. DOI:https://doi.org/10.1080/0284186X.2019.1629015.