Among the 825 infants participating in the study, 812 infants had normal results and 13 (1.6%) had abnormal reports on initial testing—five hemoglobinopathy traits (four Hb E and one Hb D), three congenital hypothyroidism, two G6PD deficiency, one CAH, one elevated acylcarnitine and one biotinidase deficiency. The gene discussed is GSTM1; the disease is biotinidase deficiency.