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National, regional, and worldwide estimates of preterm birth rates in the year 2010 with time trends since 1990 for selected countries: a systematic analysis and implications
Authors:Blencowe Hannah  Cousens Simon  Oestergaard Mikkel Z  Chou Doris  Moller Ann-Beth  Narwal Rajesh  Adler Alma  Vera Garcia Claudia  Rohde Sarah  Say Lale  Lawn Joy E
Affiliation:London School of Hygiene and Tropical Medicine, London, UK.
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