CFTR and cystic fibrosis: The designation Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) ‐related metabolic syndrome (CRMS), known in the UK and Europe as CF Screen Positive, Inconclusive Diagnosis (CFSPID) is used for infants with a positive NBS for whom follow‐up tests neither confirm, nor rule out, a CF diagnosis.