Laali, Elahe, Soheila Manifar, Ali Kazemian, Zahra Jahangard-Rafsanjani, and Kheirollah Gholami. “The Effect of Selenium Serum Levels on Oral Mucositis Frequency and Severity in Patients With Head and Neck Radiation”. Journal of Pharmaceutical Care 6, no. 3-4 (July 16, 2019): 39-43. Accessed February 17, 2020. http://jpc.tums.ac.ir/index.php/jpc/article/view/246.