CFTR and cystic fibrosis: Table 2 shows the number of infants referred from Delaware and surrounding States. As shown, the majority of patients were referred from the State of Delaware (n = 111 infants), followed by Pennsylvania (n = 42 infants), and lastly New Jersey (n = 7 infants). Infants encompassed varying ethnic backgrounds. Outcomes of infants referred with abnormal CF NBS are shown in Table 2. A number of infants were identified as CF Carriers (n = 54 infants) with 1 CFTR mutation reported on State CF NBS report and ST results <30 mmol/L.