Sarah Abdul Hameed Sahib, Ghassan Mohammad Sulaiman, and Huda J. Waheed, “Evaluation of the Frequency of  (rs2227981 and rs2282055) Single Nucleotide Polymorphisms in Programmed Cell Death 1 and Its Ligand Genes of Iraqi Patients With Multiple Sclerosis”, IJPS, vol. 33, no. 3, pp. 209–217, Sep. 2024, doi: 10.31351/vol33iss3pp209-217.