The levels of weight , height , and head circumference and the concentration of hemoglobin ( Hb ) , serum ferritin ( SF ) , and serum transferring receptor ( sTfR ) were measured and sTfR-SF index ( TFR-F index ) , total body iron content ( TBIC ) and low height for age ( HAZ ) , low weight for age ( WAZ ) , and low weight for height ( WHZ ) were computed before and after the intervention , respectively .