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Serum iron level
available transport iron
Total iron-binding capacity
transferrin levels
Transferrin saturation
transport iron and transferrin level
Serum ferritin level
iron stores
bone marrow or liver biopsy with Prussian Blue
qualitative visualization of iron stores
Soluble transferrin receptor (sTfR)
functional iron available in cells
sTfR/log ferritin index
functional iron available in cells
RBC zinc protoporphyrin level
functional iron available in RBCs
Hemoglobin content of reticulocytes
functional iron available in developing RBCs