GSTM1 and anemia (phenotype): No POC(Hb)T showed excellent diagnostic accuracy across all measurements and therefore may not meet all ASSURED criteria.(12) Five studies reported overestimation of Hb concentration in eight POC(Hb)Ts (Table 2).(15, 29, 32, 49, 58) This is vital since it could result in misclassification of severity of anaemia and therefore prevent truly eligible children from receiving a lifesaving transfusion or appropriate treatment.