title: Pulmonary function in individuals heterozygous for cystic fibrosis.
mesh_terms: D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000453:epidemiology*; D008297:Male; D012744:Sex Ratio