Columbia subject headings:
Cystic fibrosis--Diagnosis--United States.
Cystic fibrosis--United States--Genetic aspects.
Recombinant DNA.
Harvard subject headings:
Cystic fibrosis gene--Research--United States.
Cystic fibrosis--Diagnosis--United States.
Cystic fibrosis--Genetic aspects--United States.
Recombinant DNA.
Princeton subject headings:
Cystic fibrosis gene--Research--United States.
Cystic fibrosis--Diagnosis--United States.
Cystic fibrosis--United States--Genetic aspects.
Recombinant DNA.