Letter: Serum alpha-fetoprotein in cystic fibrosis.

Sera from 40 well-confirmed cystic fibrosis patients and 60 of their parents 
were obtained through two Canadian (Chicoutimi and Quebec) and one United 
States (San Diego) cystic fibrosis clinics. AFP was measured by two 
methods: a double antibody enzyme immunoassay and a sodium sulphate precipitation 
radioimmunoassay. Our results thus confirm that serum AFP levels are normal 
in cystic fibrosis. 