3mL of peripheral blood was taken from each neonate after parental consent and was collected in EDTA-containing tubes; G6PD deficiency was measured using FST (Fluorescent Spot Test) method and bilirubin was calculated using DSA (Diazo) approach. All samples were first evaluated for Mediterranean mutation and negative cases were then tested for Chatham mutation and the remaining negative cases were examined for Cosen-za mutation.