1. Reproductive failure in males with cystic fibrosis;Kaplan;N Engl J Med,1968
2. Abnormality of the epididymis and vas deferens in cystic fibrosis;Landing;Arch Pathol,1969
3. Obstructive azoospermia as a diagnostic criterion for cystic fibrosis syndrome;Stern;Lancet,1983
4. Congenital bilateral absence of the vas deferens: a primary genital form of cystic fibrosis;Anguiano;JAMA,1992
5. Congenital bilateral absence of vas deferens in the absence of cystic fibrosis;Augarten;Lancet,1994