title: Two tier screen for cystic fibrosis.
mesh_terms: D003550:Cystic Fibrosis / Q000517:prevention & control*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008403:Mass Screening / Q000379:methods; D014357:Trypsin / Q000097:blood
chemical_list: D014357:Trypsin