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State-Specific Trends in Preterm Delivery: Are Rates Really Declining Among Non-Hispanic African Americans Across the United States?
(Kluwer Academic Publishers-Plenum Publishers; Springer Science+Business Media, Inc., 2006-01)
Objectives : This study sought to examine state-specific trends in preterm delivery rates among non-Hispanic African Americans and to assess whether these rates are influenced by misclassification of gestational age. Methods ...