DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Liem S, Schuit E, Hegeman M. et al.
Cervical pessaries for prevention of preterm birth in women with a multiple pregnancy (ProTWIN): a multicentre, open-label randomised controlled trial.
Lancet 2013;
382: 1341-1349
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