title: Letter: Heterozygote advantage in cystic fibrosis.
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003550:Cystic Fibrosis; D005260:Female; D006579:Heterozygote; D006801:Humans; D007223:Infant; D008297:Male; D010551:Personality; D010555:Personality Inventory