Gloria, J. D. L. S., A. Q. Y. Pontejos, and P. E. R. Grullo. “Risk Factors for Recurrent Papillary Thyroid Carcinoma”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 32, no. 2, July 2018, pp. 25-29, doi:10.32412/pjohns.v32i2.71.