T. Almammory, R., K. Al- Bermani, O. and F. Al- Rubeiae, A. . (2015) “Evaluation of Cryoglobulin Rheumatoid Factors concentration and Total IgG and IgA Levels Among Rheumatoid Arthritis Patients”, Al-Kufa University Journal for Biology. Kufa, Najaf, IRAQ, 7(1), pp. 48–54. doi: 10.36320/ajb/v7.i1.8096.