CFTR and cystic fibrosis: The CFTR variant c.1487G>A, p.(Trp496Ter) (W496*) (class V, nonsense) is present in the ClinVar database (Variation ID: 53265) [34], is classified as pathogenic, and is reported in the literature in several studies of patients with CF [51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77].