المصادر
https://medlineplus.gov/lab-tests/ccp-antibody-test/#:~:text=If%20you%20have%20symptoms%20of%20rheumatoid%20arthritis%2C%20and%20your%20results,develop%20it%20in%20the%20future.
https://www.hss.edu/conditions_understanding-rheumatoid-arthritis-lab-tests-results.asp
https://www.mayocliniclabs.com/test-catalog/Clinical+and+Interpretive/84182
https://labtestsonline.org/tests/cyclic-citrullinated-peptide-antibody
https://emedicine.medscape.com/article/2087091-overview