title: Operational definition of cystic fibrosis. I.
mesh_terms: D000818:Animals; D003550:Cystic Fibrosis / Q000175:diagnosis* / Q000201:enzymology / Q000235:genetics / Q000378:metabolism; D005347:Fibroblasts / Q000378:metabolism; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D006867:Hydrolases / Q000378:metabolism; D008247:Lysosomes / Q000201:enzymology
chemical_list: D006867:Hydrolases