Specifically, we evaluated correction factors (CF) [5, 9], the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) regression correction (BRC) [6, 10], and restricted cubic splines (RCS) regression correction to adjust serum ferritin for inflammation using single inflammation proteins: CRP, APG, or in combination (CRP and AGP). The gene discussed is CRP; the disease is anemia.