Lapiña, G. F., and S. S. Castañeda. “Diagnostic-To-Treatment Interval and Disease Progression Among Head and Neck Cancer Patients Undergoing Surgery”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 32, no. 1, June 2017, pp. 33-36, doi:10.32412/pjohns.v32i1.175.