Rheumatology / Immunology / Humans / Female / Male / Peptides / Clinical Sciences / C reactive protein / Adult / Public health systems and services research / Retrospective Studies / Enzyme Linked Immunosorbent Assay / Hemoglobins / Case Control Studies / Peptides / Clinical Sciences / C reactive protein / Adult / Public health systems and services research / Retrospective Studies / Enzyme Linked Immunosorbent Assay / Hemoglobins / Case Control Studies