Tarek H. Abed Tawfik Al-Khyat. 2013. “The Relationship Between Tumour Necrosis Factor -Alpha and Zinc Copper Ratio in Iraqi Patients With Allergic Rhinitis”. Global Journal of Science Frontier Research 13 (G3):7-10. https://journalofscience.org/index.php/GJSFR/article/view/1065.