Ramos, J. A., and F. M. Untalan. “Effectiveness of the Philippine Health Insurance Corporation Case Rate System for Thyroidectomy in a Tertiary Government Hospital”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 35, no. 1, May 2020, pp. 51-55, doi:10.32412/pjohns.v35i1.1289.