tokens: Because there is great need for iron in the EPO stimulated erythroid progenitors , it is essential that serum ferritin and transferrin saturation levels should be maintained over 300 microg / liter and 30 % , respectively .
folded_tokens: because there be great need for iron in the epo stimulate erythroid progenitor , it be essential that serum ferritin and transferrin saturation level should be maintain over 300 microg / liter and 30 % , respectively .