Tapangco, M. P. M., W.-N. Destriza, B. D. Dimacali, and M. B. Olveda. “Topical Cepae Extract-Heparin Sodium-Allantoin Gel Versus Placebo on Hypertrophic Thyroidectomy Scars: A Randomized, Double- Blinded, Split-Scar Controlled Trial”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 27, no. 2, Dec. 2012, pp. 12-16, doi:10.32412/pjohns.v27i2.521.