TOPICS: Hemoglobin, microcytosis, serum iron, total iron binding capacity, TIBC, % saturation, transferrin, serum ferritin, red cell distribution width, RDW, iron deficiency anemia, pregnancy, conjunctival pallor, koilonychia, pica, microcytic hypochromic RBCs, free erythrocyte protoporphyrin, anemia of chronic disease, hepcidin, sideroblastic anemia, protoporphyrin, heme, aminolevulinic acid synthase, ALS, vitamin B6 deficiency, lead poisoning, ferrocheletase, rRNA, basophilic stippling, Burton lines, encephalopathy, abdominal colic, wrist and foot drop, dimercaprol, EDTA, succimer, ringed sideroblasts, Prussian blue, pyridoxine, vitamin B6