My blood results show HB-10.1(11.5-16.0),PCV-32(35-47),MCV-69,(78-96),MCH-22(27-33),RDW-19(11-16),Platelet count-350(150-400),WBC-6.4(4-11),Serum Iron-6.9(9-27),TIBC-77(45-80),%Iron Saturation-9(15-54),Ferritin-24.7(10-130).Liver function,Renal Function,Cardiovascular,diabetec,Urinalysis are all normal.Is this purely iron dificiency ?