GSTM1 and Hypertension: Kwa et al,[10] (poor vein and underweight donors), Charles et al,[11] (low Hb and Hypertension), Zou et al,[8] (travel to malaria area and miscellaneous blood exposure), and Rabeya et al,[9] (high blood pressure and medical illness) have cited various other common reasons for deferral in respective study population.