FGF23 and Iron deficiency anemia: Wolf et al. [18] have tested the association of iron deficiency anemia with C-terminal FGF23 (cFGF23) and intact FGF23 (iFGF23) levels in 55 women with history of heavy uterine bleeding and assessed the longitudinal biological response over 35 days to equivalent doses of randomly-assigned, intravenous elemental iron as FCM or iron dextran.