Abooshahab, R., E. Niyazi, P. Yaghmaie, H.G. Ghadaksaz, and M. Hedayati. “Serum Level of Dipeptidyl Peptidase-4 As a Potential Biomarker for Medullary Thyroid Cancer”. Experimental Oncology 40, no. 4 (December 22, 2018): 299–302. Accessed May 20, 2026. https://exp-oncology.com.ua/index.php/Exp/article/view/2018-4-6.