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Gerhard I, Henninger R, von Holst T, Runnebaum B, Kubli F.Gerhard I, et al. Among authors: runnebaum b.Z Geburtshilfe Perinatol. 1989 Jan-Feb;193(1):29-41.Z Geburtshilfe Perinatol. 1989.PMID: 2711726German.
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