The New England Journal of Medicine Downloaded from nejm.org on November 17, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org on November 17, 2015. For personal use only. No other uses without permission. Copyright © 1992 Massachusetts Medical Society. All rights reserved.

Fetal fibronectin and preterm labor.

The New England Journal of Medicine Downloaded from nejm.org on November 17, 2015. For personal use only. No other uses without permission. Copyright...
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