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Tekesin I, Meyer-Wittkopf M, Sierra F, Schmidt S.Tekesin I, et al.Z Geburtshilfe Neonatol. 2002 May-Jun;206(3):88-93. doi: 10.1055/s-2002-32648.Z Geburtshilfe Neonatol. 2002.PMID: 12098823German.