Duch Lynggaard, Charlotte, et al. “The EXTREME Regimen for Recurrent Metastatic Head and Neck Squamous Cell Carcinoma (R M HNSCC): Treatment Outcome in a Single Institution Cohort”. Acta Oncologica, vol. 54, no. 7, Aug. 2015, pp. 1071-5, doi:10.3109/0284186X.2014.964308.