“MTHFR Gene Polymorphisms in Iraqi Kurdish Rheumatoid Arthritis Patients: Relation to Methotrexate Response and Toxicity”. Iraqi Journal of Science 63, no. 12 (December 30, 2022): 5186–5196. Accessed August 8, 2025. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6533.