The New England Journal of Medicine Downloaded from nejm.org on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

Cystic fibrosis and congenital absence of the vas deferens.

The New England Journal of Medicine Downloaded from nejm.org on November 14, 2015. For personal use only. No other uses without permission. Copyright...
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