Methods
We selectively searched the PubMed database for articles published from 1966 to 2012 containing the
key words “preterm delivery,” “preterm birth,” “tocolysis,” and “tocolytic therapy” in order to identify all relevant randomized controlled trials, systematic reviews, and meta-analyses. The search was limited to studies in human beings and to publications in English or German. The current guidelines of the European, British, and American obstetric societies were also considered in the analysis (5–7).
MethodsWe selectively searched the PubMed database for articles published from 1966 to 2012 containing thekey words “preterm delivery,” “preterm birth,” “tocolysis,” and “tocolytic therapy” in order to identify all relevant randomized controlled trials, systematic reviews, and meta-analyses. The search was limited to studies in human beings and to publications in English or German. The current guidelines of the European, British, and American obstetric societies were also considered in the analysis (5–7).
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