CF	Cystic Fibrosis
CF NBS	Cystic Fibrosis Newborn Bloodspot Screening
CF TDN	Cystic Fibrosis Therapeutics Development Network
CFTR	Cystic fibrosis transmembrane conductance regulator
CRMS/CFSPID	Cystic fibrosis transmembrane conductance regulator-related metabolic syndrome/cystic fibrosis screen positive, inconclusive diagnosis
ECFS DNWG	European Cystic Fibrosis Society Diagnostic Network Working Group
HC	Healthy control
ICM	Intestinal Current Measurement
IRT	Immunoreactive Trypsin
IRT/DNA/EGA	Immunoreactive Trypsin Analysis/Analysis of genetic material, detection of variants in the CFTR gene/Genotypic analysis, identification of variants in the CFTR gene
ISC	Short circuit-current
NPD	Nasal Potential Difference
PBS	Phosphate-Buffered Saline
PI-CF	Cystic fibrosis with pancreatic insufficiency
PS-CF	Cystic fibrosis with pancreatic sufficiency
SOP	Standard operating procedure
VUC	Variant of unknown clinical significance
VVCC	Variant with varying clinical consequence