Cystic fibrosis (CF) is an autosomal recessive, life-limiting condition affecting approximately 100,000 people worldwide, caused by mutations to the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR) protein1 [Cystic Fibrosis FAQs - What is cystic fibrosis?]. Here, CFTR is linked to cystic fibrosis.