T. Almammory, Raheem, Oruba. K. Al- Bermani, and Abeer . F. Al- Rubeiae. 2015. “Evaluation of Cryoglobulin Rheumatoid Factors Concentration and Total IgG and IgA Levels Among Rheumatoid Arthritis Patients”. Al-Kufa University Journal for Biology 7 (1). Kufa, Najaf, IRAQ:48-54. https://doi.org/10.36320/ajb/v7.i1.8096.