Ali, Humaira, Junaid Alam, Ali Nadeem, and Shazia Naureen. “Diagnostic Accuracy of Anti-Cyclic Citrullinated Peptide Antibodies in Rheumatoid Arthritis”. Pakistan Journal of Physiology 15, no. 2 (June 30, 2019): 3-6. Accessed March 28, 2020. https://pjp.pps.org.pk/index.php/PJP/article/view/973.