CFTR and cystic fibrosis: Table 2 describes the CFTR gene variants identified in the study sample, including traditional nomenclature, allele count, relative frequency, complementary Deoxyribonucleic Acid (cDNA) and protein alterations, functional classification, Single Nucleotide Polymorphism database identifier (dbSNP identifier), and prevalence according to data from the Cystic Fibrosis Foundation (CFF) and the Brazilian Cystic Fibrosis Registry (Registro Brasileiro de Fibrose Cística—REBRAFC).