Yadgar Aziz Abdullah, Abdulwahid Mohammed Salih, Ari Mohammed Abdullah, Mohammed Abdalkarim Hama Ali, and Ali Hattem Hussain. “Correlations of Cancer Antigen 19-9 and Carcinoembryonic Antigen With Histopathological and Clinical Features Among Malignant Thyroid Tumors”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 7, Apr. 2023, pp. 56-71, doi:10.47750/jptcp.2023.30.07.008.