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Todorow SJ, Siebzehnrübl ER, Koch R, Wildt L, Lang N.Todorow SJ, et al. Among authors: lang n.Hum Reprod. 1989 Oct;4(7):805-11. doi: 10.1093/oxfordjournals.humrep.a136990.Hum Reprod. 1989.PMID: 2606958
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Siebzehnrübl E, Todorow S, Spitzer M, Neuwinger J, Wildt L, Lang N.Siebzehnrübl E, et al. Among authors: lang n.Geburtshilfe Frauenheilkd. 1993 May;53(5):359-65. doi: 10.1055/s-2007-1022898.Geburtshilfe Frauenheilkd. 1993.PMID: 8514111German.
Siebzehnrübl E, van Uem J, Todorow S, Wildt L, Lang N.Siebzehnrübl E, et al. Among authors: lang n.Arch Gynecol Obstet. 1989;245(1-4):841-3. doi: 10.1007/BF02417583.Arch Gynecol Obstet. 1989.PMID: 2802775German.No abstract available.