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Hösli, Irène; Sperschneider, Christiane; Drack, Gero; Zimmermann, Roland; Surbek, Daniel; Irion, Olivier (2014). Tocolysis for preterm labor: expert opinion. Archives of gynecology and obstetrics, 289(4), pp. 903-909. Springer 10.1007/s00404-013-3137-9
