https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1611139
Van der Schroeff, M.P., Derks, W., Hordijk, G.J., et al. (2007) The Effect of Age on Survival and...
Van der Schroeff, M.P., Derks, W., Hordijk, G.J., et al. (2007) The Effect of Age on Survival and Quality of Life in Elderly Head and Neck Cancer Patients A...