The Role of Vitamin B12 in Regulation the Immune Response in Patients with Rheumatoid Arthritis. cbej [Internet]. 2025 Jun. 21 [cited 2026 Jun. 4];2(عدد خاص):64-76. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/13218