The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity.

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@article{Beck2010TheWI, title={The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity.}, author={Stacy Beck and Daniel Wojdyla and Lale Say and Ana Pilar Betr{\'a}n and Mario Merialdi and Jennifer A Harris Requejo and Craig Rubens and Jossimara Polettini and Paul F A Van Look}, journal={Bulletin of the World Health Organization}, year={2010}, volume={88 1}, pages={31-8} }