“Serum Vitamin D and Anti-Cyclic Citrullinated Peptide Levels in Rheumatoid Arthritis Patients”. Biomedical Research and Therapy 9, no. 7 (July 31, 2022): 5149–5153. Accessed November 15, 2024. https://preservation.bmrat.org/index.php/BMRAT/article/view/750.