four different tracers : imferon ( an iron-dextran measuring 11 x 7 x 7 nm ) , ferritin ( a spherical iron-protein 12 nm in diameter ) , imposil ( an iron-dextran measuring 21 x 12 x 12 nm ) and colloidal gold-protein ( 20-25 nm in diameter ) were injected into the palmaris longus muscle .
C0302583
iron
C0022092
iron-dextran